diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bd9b95..fed2470 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -209,6 +209,7 @@ set(VMIX_SRCS
     View.cpp
     Source.cpp
     Session.cpp
+    SessionSource.cpp
     SessionVisitor.cpp
     GarbageVisitor.cpp
     SessionCreator.cpp
@@ -218,6 +219,7 @@ set(VMIX_SRCS
     Resource.cpp
     FileDialog.cpp
     MediaPlayer.cpp
+    MediaSource.cpp
     FrameBuffer.cpp
     RenderingManager.cpp
     UserInterfaceManager.cpp
diff --git a/MediaSource.cpp b/MediaSource.cpp
new file mode 100644
index 0000000..ab8f214
--- /dev/null
+++ b/MediaSource.cpp
@@ -0,0 +1,155 @@
+#include <glm/gtc/matrix_transform.hpp>
+
+#include "MediaSource.h"
+
+#include "defines.h"
+#include "ImageShader.h"
+#include "ImageProcessingShader.h"
+#include "Resource.h"
+#include "Primitives.h"
+#include "MediaPlayer.h"
+#include "Visitor.h"
+#include "Log.h"
+
+MediaSource::MediaSource() : Source(), path_("")
+{
+    // create media player
+    mediaplayer_ = new MediaPlayer;
+
+    // create media surface:
+    // - textured with original texture from media player
+    // - crop & repeat UV can be managed here
+    // - additional custom shader can be associated
+    mediasurface_ = new Surface(rendershader_);
+
+}
+
+MediaSource::~MediaSource()
+{
+    // TODO delete media surface with visitor
+    delete mediasurface_;
+
+    delete mediaplayer_;
+    // TODO verify that all surfaces and node is deleted in Source destructor
+}
+
+void MediaSource::setPath(const std::string &p)
+{
+    path_ = p;
+    mediaplayer_->open(path_);
+    mediaplayer_->play(true);
+
+    Log::Notify("Opening %s", p.c_str());
+}
+
+std::string MediaSource::path() const
+{
+    return path_;
+}
+
+MediaPlayer *MediaSource::mediaplayer() const
+{
+    return mediaplayer_;
+}
+
+bool MediaSource::failed() const
+{
+    return mediaplayer_->failed();
+}
+
+void MediaSource::init()
+{
+    if ( mediaplayer_->isOpen() ) {
+
+        // update video
+        mediaplayer_->update();
+
+        // once the texture of media player is created
+        if (mediaplayer_->texture() != Resource::getTextureBlack()) {
+
+            // get the texture index from media player, apply it to the media surface
+            mediasurface_->setTextureIndex( mediaplayer_->texture() );
+
+            // create Frame buffer matching size of media player
+            float height = float(mediaplayer()->width()) / mediaplayer()->aspectRatio();
+            renderbuffer_ = new FrameBuffer(mediaplayer()->width(), (uint)height);
+
+            // create the surfaces to draw the frame buffer in the views
+            // TODO Provide the source custom effect shader
+            rendersurface_ = new FrameBufferSurface(renderbuffer_, blendingshader_);
+            groups_[View::RENDERING]->attach(rendersurface_);
+            groups_[View::GEOMETRY]->attach(rendersurface_);
+            groups_[View::MIXING]->attach(rendersurface_);
+            groups_[View::LAYER]->attach(rendersurface_);
+
+            // for mixing view, add another surface to overlay (for stippled view in transparency)
+            Surface *surfacemix = new FrameBufferSurface(renderbuffer_);
+            ImageShader *is = static_cast<ImageShader *>(surfacemix->shader());
+            if (is)  is->stipple = 1.0;
+            groups_[View::MIXING]->attach(surfacemix);
+            groups_[View::LAYER]->attach(surfacemix);
+            if (mediaplayer_->duration() == GST_CLOCK_TIME_NONE)
+                overlays_[View::MIXING]->attach( new Mesh("mesh/icon_image.ply") );
+            else
+                overlays_[View::MIXING]->attach( new Mesh("mesh/icon_video.ply") );
+
+            // scale all mixing nodes to match aspect ratio of the media
+            for (NodeSet::iterator node = groups_[View::MIXING]->begin();
+                 node != groups_[View::MIXING]->end(); node++) {
+                (*node)->scale_.x = mediaplayer_->aspectRatio();
+            }
+            for (NodeSet::iterator node = groups_[View::GEOMETRY]->begin();
+                 node != groups_[View::GEOMETRY]->end(); node++) {
+                (*node)->scale_.x = mediaplayer_->aspectRatio();
+            }
+            for (NodeSet::iterator node = groups_[View::LAYER]->begin();
+                 node != groups_[View::LAYER]->end(); node++) {
+                (*node)->scale_.x = mediaplayer_->aspectRatio();
+            }
+
+            // done init once and for all
+            initialized_ = true;
+            // make visible
+            groups_[View::RENDERING]->visible_ = true;
+            groups_[View::MIXING]->visible_ = true;
+            groups_[View::GEOMETRY]->visible_ = true;
+            groups_[View::LAYER]->visible_ = true;
+        }
+    }
+
+}
+
+void MediaSource::render()
+{
+    if (!initialized_)
+        init();
+    else {
+        // update video
+        mediaplayer_->update();
+
+        // render the media player into frame buffer
+        static glm::mat4 projection = glm::ortho(-1.f, 1.f, 1.f, -1.f, -1.f, 1.f);
+        renderbuffer_->begin();
+        mediasurface_->draw(glm::identity<glm::mat4>(), projection);
+        renderbuffer_->end();
+    }
+}
+
+FrameBuffer *MediaSource::frame() const
+{
+    if (initialized_ && renderbuffer_)
+    {
+        return renderbuffer_;
+    }
+    else {
+        static FrameBuffer *black = new FrameBuffer(640,480);
+        return black;
+    }
+
+}
+
+void MediaSource::accept(Visitor& v)
+{
+    Source::accept(v);
+    v.visit(*this);
+}
diff --git a/MediaSource.h b/MediaSource.h
new file mode 100644
index 0000000..9553c1d
--- /dev/null
+++ b/MediaSource.h
@@ -0,0 +1,32 @@
+#ifndef MEDIASOURCE_H
+#define MEDIASOURCE_H
+
+#include "Source.h"
+
+class MediaSource : public Source
+{
+public:
+    MediaSource();
+    ~MediaSource();
+
+    // implementation of source API
+    FrameBuffer *frame() const override;
+    void render() override;
+    void accept (Visitor& v) override;
+    bool failed() const override;
+
+    // Media specific interface
+    void setPath(const std::string &p);
+    std::string path() const;
+    MediaPlayer *mediaplayer() const;
+
+protected:
+
+    void init() override;
+
+    Surface *mediasurface_;
+    std::string path_;
+    MediaPlayer *mediaplayer_;
+};
+
+#endif // MEDIASOURCE_H
diff --git a/Mixer.cpp b/Mixer.cpp
index 530db8d..c2b9895 100644
--- a/Mixer.cpp
+++ b/Mixer.cpp
@@ -1,52 +1,54 @@
 #include <algorithm>
 #include <thread>
+#include <atomic>
+#include <vector>
+#include <chrono>
 
 #include <tinyxml2.h>
 #include "tinyxml2Toolkit.h"
 using namespace tinyxml2;
 
 #include "defines.h"
+#include "Settings.h"
 #include "Log.h"
 #include "View.h"
-#include "Primitives.h"
-#include "Mesh.h"
-#include "FrameBuffer.h"
-#include "Settings.h"
 #include "SystemToolkit.h"
-#include "ImageProcessingShader.h"
-#include "GarbageVisitor.h"
+//#include "GarbageVisitor.h"
 #include "SessionVisitor.h"
 #include "SessionCreator.h"
-#include "MediaPlayer.h"
+#include "SessionSource.h"
+#include "MediaSource.h"
 
 #include "Mixer.h"
 
 // static objects for multithreaded session loading
 static std::atomic<bool> sessionThreadActive_ = false;
 static std::string sessionThreadFilename_ = "";
-
 static std::atomic<bool> sessionLoadFinished_ = false;
+
 static void loadSession(const std::string& filename, Session *session)
 {
-     sessionThreadActive_ = true;
-     sessionLoadFinished_ = false;
-     sessionThreadFilename_ = "";
+    while (sessionThreadActive_)
+        std::this_thread::sleep_for( std::chrono::milliseconds(50));
+    sessionThreadActive_ = true;
+    sessionLoadFinished_ = false;
+    sessionThreadFilename_ = "";
 
-     // actual loading of xml file
-     SessionCreator creator( session );
+    // actual loading of xml file
+    SessionCreator creator( session );
 
-     if (!creator.load(filename)) {
-         // error loading
-         Log::Notify("Failed to load Session file %s.", filename.c_str());
-     }
-     else {
-         // loaded ok
-         Log::Notify("Session %s loaded. %d source(s) created.", filename.c_str(), session->numSource());
-     }
+    if (!creator.load(filename)) {
+        // error loading
+        Log::Warning("Failed to load Session file %s.", filename.c_str());
+    }
+    else {
+        // loaded ok
+        Log::Notify("Session %s loaded. %d source(s) created.", filename.c_str(), session->numSource());
+    }
 
-     sessionThreadFilename_ = filename;
-     sessionLoadFinished_ = true;
-     sessionThreadActive_ = false;
+    sessionThreadFilename_ = filename;
+    sessionLoadFinished_ = true;
+    sessionThreadActive_ = false;
 }
 
 // static objects for multithreaded session saving
@@ -54,6 +56,8 @@ static std::atomic<bool> sessionSaveFinished_ = false;
 static void saveSession(const std::string& filename, Session *session)
 {
     // reset
+    while (sessionThreadActive_)
+        std::this_thread::sleep_for( std::chrono::milliseconds(50));
     sessionThreadActive_ = true;
     sessionSaveFinished_ = false;
     sessionThreadFilename_ = "";
@@ -175,22 +179,44 @@ void Mixer::draw()
 }
 
 // manangement of sources
-void Mixer::createSourceMedia(std::string path)
+void Mixer::createSourceFile(std::string path)
 {
-    // create source
-    MediaSource *m = new MediaSource();
-    m->setPath(path);
+    // sanity check
+    if ( !SystemToolkit::file_exists( path ) ) {
+        Log::Notify("File %s does not exist.", path);
+        return;
+    }
+    // ready to create a source
+    Source *s = nullptr;
+
+    // test type of file by extension
+    std::string ext = SystemToolkit::extension_filename(path);
+    if ( ext == "vmx" )
+    {
+        // create a session source
+        SessionSource *ss = new SessionSource();
+        ss->setPath(path);
+        s = ss;
+    }
+    else {
+        // (try to) create media source by default
+        MediaSource *ms = new MediaSource();
+        ms->setPath(path);
+        s = ms;
+    }
 
     // remember in recent media
-    Settings::application.recentMedia.push(path);
+    Settings::application.recentImport.push(path);
+    Settings::application.recentImport.path = SystemToolkit::path_filename(path);
 
     // propose a new name based on uri
-    renameSource(m, SystemToolkit::base_filename(path));
+    renameSource(s, SystemToolkit::base_filename(path));
 
     // add to mixer
-    insertSource(m);
+    insertSource(s);
 }
 
+
 void Mixer::insertSource(Source *s)
 {
     // Add source to Session and set it as current
@@ -353,18 +379,12 @@ View *Mixer::currentView()
 
 void Mixer::save()
 {
-    if (sessionThreadActive_)
-        return;
-
     if (!sessionFilename_.empty())
         saveas(sessionFilename_);
 }
 
 void Mixer::saveas(const std::string& filename)
 {
-    if (sessionThreadActive_)
-        return;
-
     // optional copy of views config
     session_->config(View::MIXING)->copyTransform( mixing_.scene.root() );
     session_->config(View::GEOMETRY)->copyTransform( geometry_.scene.root() );
@@ -376,9 +396,6 @@ void Mixer::saveas(const std::string& filename)
 
 void Mixer::open(const std::string& filename)
 {
-    if (sessionThreadActive_)
-        return;
-
     if (back_session_)
         delete back_session_;
 
diff --git a/Mixer.h b/Mixer.h
index a71ca49..5c84bf3 100644
--- a/Mixer.h
+++ b/Mixer.h
@@ -1,7 +1,6 @@
 #ifndef MIXER_H
 #define MIXER_H
 
-#include <vector>
 
 //  GStreamer
 #include <gst/gst.h>
@@ -11,6 +10,7 @@
 #include "Session.h"
 #include "Source.h"
 
+
 class Mixer
 {
     // Private Constructor
@@ -34,7 +34,7 @@ public:
     void draw();
 
     // manangement of sources
-    void createSourceMedia(std::string path);
+    void createSourceFile(std::string path);
 
     void deleteSource(Source *s);
     void deleteCurrentSource();
diff --git a/RenderingManager.cpp b/RenderingManager.cpp
index 19bda29..76ed2db 100644
--- a/RenderingManager.cpp
+++ b/RenderingManager.cpp
@@ -438,18 +438,8 @@ void Rendering::FileDropped(GLFWwindow *, int path_count, const char* paths[])
         std::string filename(paths[i]);
         if (filename.empty())
             break;
-        std::string ext = SystemToolkit::extension_filename(filename);
-//        Log::Info("Dropped file %s %s\n", filename.c_str(), ext.c_str());
-        if ( ext == "vmx" )
-        {
-            // try to load a session
-            Mixer::manager().open(filename);
-        }
-        else {
-            // try to create a media source
-            Mixer::manager().createSourceMedia( filename );
-        }
-
+        // try to create a source
+        Mixer::manager().createSourceFile( filename );
     }
 }
 
diff --git a/SessionCreator.cpp b/SessionCreator.cpp
index cbefd8d..30cb870 100644
--- a/SessionCreator.cpp
+++ b/SessionCreator.cpp
@@ -6,6 +6,7 @@
 #include "Primitives.h"
 #include "Mesh.h"
 #include "Source.h"
+#include "MediaSource.h"
 #include "Session.h"
 #include "ImageShader.h"
 #include "ImageProcessingShader.h"
diff --git a/SessionSource.cpp b/SessionSource.cpp
new file mode 100644
index 0000000..480ab17
--- /dev/null
+++ b/SessionSource.cpp
@@ -0,0 +1,176 @@
+#include <glm/gtc/matrix_transform.hpp>
+#include <thread>
+#include <chrono>
+
+#include "SessionSource.h"
+
+#include "defines.h"
+#include "Log.h"
+#include "FrameBuffer.h"
+#include "ImageShader.h"
+#include "ImageProcessingShader.h"
+#include "Resource.h"
+#include "Primitives.h"
+#include "Mesh.h"
+#include "SearchVisitor.h"
+#include "Session.h"
+#include "SessionCreator.h"
+
+
+void SessionSource::loadSession(const std::string& filename, SessionSource *source)
+{
+    source->loadFinished_ = false;
+
+    // actual loading of xml file
+    SessionCreator creator( source->session_ );
+
+    if (!creator.load(filename)) {
+        // error loading
+        Log::Notify("Failed to load Session file %s.", filename.c_str());
+        source->loadFailed_ = true;
+    }
+
+    source->loadFinished_ = true;
+}
+
+SessionSource::SessionSource() : Source(), path_("")
+{
+    loadFailed_ = false;
+    loadFinished_ = false;
+
+    session_ = new Session;
+
+    // create surface:
+    // - textured with original texture from session
+    // - crop & repeat UV can be managed here
+    // - additional custom shader can be associated
+    sessionsurface_ = new Surface(rendershader_);
+}
+
+SessionSource::~SessionSource()
+{
+    // TODO delete media surface with visitor
+    delete sessionsurface_;
+
+    // TODO close and delete session
+    delete session_;
+}
+
+void SessionSource::setPath(const std::string &p)
+{
+    path_ = p;
+
+    // launch a thread to load the session
+    std::thread ( SessionSource::loadSession, path_, this).detach();
+
+    Log::Notify("Opening %s", p.c_str());
+}
+
+std::string SessionSource::path() const
+{
+    return path_;
+}
+
+Session *SessionSource::session() const
+{
+    return session_;
+}
+
+bool SessionSource::failed() const
+{
+    return loadFailed_;
+}
+
+void SessionSource::init()
+{
+    if ( loadFinished_ && !loadFailed_ ) {
+        loadFinished_ = false;
+
+        // set resolution
+        session_->setResolution( session_->config(View::RENDERING)->scale_ );
+
+        // get the texture index from media player, apply it to the media surface
+        sessionsurface_->setTextureIndex( session_->frame()->texture() );
+
+        // create Frame buffer matching size of media player
+        renderbuffer_ = new FrameBuffer(session_->frame()->resolution());
+
+        // create the surfaces to draw the frame buffer in the views
+        rendersurface_ = new FrameBufferSurface(renderbuffer_, blendingshader_);
+        groups_[View::RENDERING]->attach(rendersurface_);
+        groups_[View::GEOMETRY]->attach(rendersurface_);
+        groups_[View::MIXING]->attach(rendersurface_);
+        groups_[View::LAYER]->attach(rendersurface_);
+
+        // for mixing view, add another surface to overlay (for stippled view in transparency)
+        Surface *surfacemix = new FrameBufferSurface(renderbuffer_);
+        ImageShader *is = static_cast<ImageShader *>(surfacemix->shader());
+        if (is)  is->stipple = 1.0;
+        groups_[View::MIXING]->attach(surfacemix);
+        groups_[View::LAYER]->attach(surfacemix);
+        // TODO icon session
+//            overlays_[View::MIXING]->attach( new Mesh("mesh/icon_video.ply") );
+
+        // scale all mixing nodes to match aspect ratio of the media
+        for (NodeSet::iterator node = groups_[View::MIXING]->begin();
+             node != groups_[View::MIXING]->end(); node++) {
+            (*node)->scale_.x = session_->frame()->aspectRatio();
+        }
+        for (NodeSet::iterator node = groups_[View::GEOMETRY]->begin();
+             node != groups_[View::GEOMETRY]->end(); node++) {
+            (*node)->scale_.x = session_->frame()->aspectRatio();
+        }
+        for (NodeSet::iterator node = groups_[View::LAYER]->begin();
+             node != groups_[View::LAYER]->end(); node++) {
+            (*node)->scale_.x = session_->frame()->aspectRatio();
+        }
+
+        // done init once and for all
+        initialized_ = true;
+
+        // make visible
+        groups_[View::RENDERING]->visible_ = true;
+        groups_[View::MIXING]->visible_ = true;
+        groups_[View::GEOMETRY]->visible_ = true;
+        groups_[View::LAYER]->visible_ = true;
+
+        Log::Info("Source Session %s loading %d sources.", path_.c_str(), session_->numSource());
+    }
+}
+
+void SessionSource::render()
+{
+    if (!initialized_)
+        init();
+    else {
+        // update session
+        session_->update(dt_);
+
+        sessionsurface_->setTextureIndex( session_->frame()->texture() );
+
+        // render the media player into frame buffer
+        static glm::mat4 projection = glm::ortho(-1.f, 1.f, -1.f, 1.f, -1.f, 1.f);
+        renderbuffer_->begin();
+        sessionsurface_->draw(glm::identity<glm::mat4>(), projection);
+        renderbuffer_->end();
+    }
+}
+
+FrameBuffer *SessionSource::frame() const
+{
+    if (initialized_ && renderbuffer_)
+    {
+        return renderbuffer_;
+    }
+    else {
+        static FrameBuffer *black = new FrameBuffer(640,480);
+        return black;
+    }
+}
+
+void SessionSource::accept(Visitor& v)
+{
+    Source::accept(v);
+    v.visit(*this);
+}
+
diff --git a/SessionSource.h b/SessionSource.h
new file mode 100644
index 0000000..476d226
--- /dev/null
+++ b/SessionSource.h
@@ -0,0 +1,36 @@
+#ifndef SESSIONSOURCE_H
+#define SESSIONSOURCE_H
+
+#include <atomic>
+#include "Source.h"
+
+class SessionSource : public Source
+{
+public:
+    SessionSource();
+    ~SessionSource();
+
+    // implementation of source API
+    FrameBuffer *frame() const override;
+    void render() override;
+    void accept (Visitor& v) override;
+    bool failed() const override;
+
+    // Media specific interface
+    void setPath(const std::string &p);
+    std::string path() const;
+    Session *session() const;
+
+protected:
+
+    void init() override;
+    static void loadSession(const std::string& filename, SessionSource *source);
+
+    Surface *sessionsurface_;
+    std::string path_;
+    Session *session_;
+
+    std::atomic<bool> loadFailed_;
+    std::atomic<bool> loadFinished_;
+};
+#endif // SESSIONSOURCE_H
diff --git a/SessionVisitor.cpp b/SessionVisitor.cpp
index 4fe74c1..fe1ff05 100644
--- a/SessionVisitor.cpp
+++ b/SessionVisitor.cpp
@@ -5,6 +5,7 @@
 #include "Primitives.h"
 #include "Mesh.h"
 #include "Source.h"
+#include "MediaSource.h"
 #include "ImageShader.h"
 #include "ImageProcessingShader.h"
 #include "MediaPlayer.h"
diff --git a/Settings.cpp b/Settings.cpp
index 17c640e..9d394fd 100644
--- a/Settings.cpp
+++ b/Settings.cpp
@@ -108,10 +108,10 @@ void Settings::Save()
         };
         recent->InsertEndChild(recentsession);
 
-        XMLElement *recentmedia = xmlDoc.NewElement( "Media" );
-        recentmedia->SetAttribute("path", application.recentMedia.path.c_str());
-        for(auto it = application.recentMedia.filenames.begin();
-            it != application.recentMedia.filenames.end(); it++) {
+        XMLElement *recentmedia = xmlDoc.NewElement( "Import" );
+        recentmedia->SetAttribute("path", application.recentImport.path.c_str());
+        for(auto it = application.recentImport.filenames.begin();
+            it != application.recentImport.filenames.end(); it++) {
 
             XMLElement *fileNode = xmlDoc.NewElement("path");
             XMLText *text = xmlDoc.NewText( (*it).c_str() );
@@ -245,21 +245,21 @@ void Settings::Load()
                 }
             }
             // recent media uri
-            XMLElement * pMedia = pElement->FirstChildElement("Media");
-            if (pMedia)
+            XMLElement * pImport = pElement->FirstChildElement("Import");
+            if (pImport)
             {
-                const char *path_ = pMedia->Attribute("path");
+                const char *path_ = pImport->Attribute("path");
                 if (path_)
-                    application.recentMedia.path = std::string(path_);
+                    application.recentImport.path = std::string(path_);
                 else
-                    application.recentMedia.path = SystemToolkit::home_path();
-                application.recentMedia.filenames.clear();
-                XMLElement* path = pMedia->FirstChildElement("path");
+                    application.recentImport.path = SystemToolkit::home_path();
+                application.recentImport.filenames.clear();
+                XMLElement* path = pImport->FirstChildElement("path");
                 for( ; path ; path = path->NextSiblingElement())
                 {
                     const char *p = path->GetText();
                     if (p)
-                    application.recentMedia.push( std::string (p) );
+                    application.recentImport.push( std::string (p) );
                 }
             }
         }
diff --git a/Settings.h b/Settings.h
index 4c4e0ca..01be91f 100644
--- a/Settings.h
+++ b/Settings.h
@@ -82,7 +82,7 @@ struct Application
 
     // recent files histories
     History recentSessions;
-    History recentMedia;
+    History recentImport;
 
     Application() : name(APP_NAME){
         scale = 1.f;
diff --git a/Source.cpp b/Source.cpp
index 0e5facc..9d935ca 100644
--- a/Source.cpp
+++ b/Source.cpp
@@ -6,14 +6,11 @@
 
 #include "defines.h"
 #include "FrameBuffer.h"
-#include "ImageShader.h"
-#include "ImageProcessingShader.h"
-#include "Resource.h"
 #include "Primitives.h"
 #include "Mesh.h"
-#include "MediaPlayer.h"
 #include "SearchVisitor.h"
-
+#include "ImageShader.h"
+#include "ImageProcessingShader.h"
 #include "Log.h"
 
 Source::Source() : initialized_(false), need_update_(true)
@@ -32,13 +29,18 @@ Source::Source() : initialized_(false), need_update_(true)
     groups_[View::MIXING]->visible_ = false;
     Frame *frame = new Frame(Frame::ROUND_THIN);
     frame->translation_.z = 0.1;
-    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 0.9f);
+    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 0.7f);
     groups_[View::MIXING]->attach(frame);
     groups_[View::MIXING]->scale_ = glm::vec3(0.15f, 0.15f, 1.f);
+    groups_[View::MIXING]->translation_ = glm::vec3(-1.f, 1.f, 0.f);
 
     overlays_[View::MIXING] = new Group;
     overlays_[View::MIXING]->translation_.z = 0.1;
     overlays_[View::MIXING]->visible_ = false;
+    frame = new Frame(Frame::ROUND_LARGE);
+    frame->translation_.z = 0.1;
+    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
+    overlays_[View::MIXING]->attach(frame);
     groups_[View::MIXING]->attach(overlays_[View::MIXING]);
 
     // default geometry nodes
@@ -46,12 +48,31 @@ Source::Source() : initialized_(false), need_update_(true)
     groups_[View::GEOMETRY]->visible_ = false;
     frame = new Frame(Frame::SHARP_THIN);
     frame->translation_.z = 0.1;
-    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 0.9f);
+    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 0.7f);
     groups_[View::GEOMETRY]->attach(frame);
 
     overlays_[View::GEOMETRY] = new Group;
     overlays_[View::GEOMETRY]->translation_.z = 0.15;
     overlays_[View::GEOMETRY]->visible_ = false;
+    frame = new Frame(Frame::SHARP_LARGE);
+    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
+    overlays_[View::GEOMETRY]->attach(frame);
+    resize_handle_ = new Handles(Handles::RESIZE);
+    resize_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
+    resize_handle_->translation_.z = 0.1;
+    overlays_[View::GEOMETRY]->attach(resize_handle_);
+    resize_H_handle_ = new Handles(Handles::RESIZE_H);
+    resize_H_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
+    resize_H_handle_->translation_.z = 0.1;
+    overlays_[View::GEOMETRY]->attach(resize_H_handle_);
+    resize_V_handle_ = new Handles(Handles::RESIZE_V);
+    resize_V_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
+    resize_V_handle_->translation_.z = 0.1;
+    overlays_[View::GEOMETRY]->attach(resize_V_handle_);
+    rotate_handle_ = new Handles(Handles::ROTATE);
+    rotate_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
+    rotate_handle_->translation_.z = 0.1;
+    overlays_[View::GEOMETRY]->attach(rotate_handle_);
     groups_[View::GEOMETRY]->attach(overlays_[View::GEOMETRY]);
 
     // default mixing nodes
@@ -59,7 +80,7 @@ Source::Source() : initialized_(false), need_update_(true)
     groups_[View::LAYER]->visible_ = false;
     frame = new Frame(Frame::ROUND_SHADOW);
     frame->translation_.z = 0.1;
-    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 0.9f);
+    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 0.8f);
     groups_[View::LAYER]->attach(frame);
 
     overlays_[View::LAYER] = new Group;
@@ -72,10 +93,6 @@ Source::Source() : initialized_(false), need_update_(true)
     rendershader_ = new ImageProcessingShader;
     renderbuffer_ = nullptr;
     rendersurface_ = nullptr;
-    resize_handle_ = nullptr;
-    resize_H_handle_ = nullptr;
-    resize_V_handle_ = nullptr;
-    rotate_handle_ = nullptr;
 }
 
 Source::~Source()
@@ -117,6 +134,10 @@ void Source::setOverlayVisible(bool on)
 
 void Source::update(float dt)
 {
+    // keep delta-t
+    dt_ = dt;
+
+    // update nodes if needed
     if (need_update_)
     {
         // ADJUST alpha based on MIXING node
@@ -173,175 +194,4 @@ bool hasNode::operator()(const Source* elem) const
     return false;
 }
 
-MediaSource::MediaSource() : Source(), path_("")
-{
-    // create media player
-    mediaplayer_ = new MediaPlayer;
 
-    // create media surface:
-    // - textured with original texture from media player
-    // - crop & repeat UV can be managed here
-    // - additional custom shader can be associated
-    mediasurface_ = new Surface(rendershader_);
-
-    // extra overlay for mixing view
-    Frame *frame = new Frame(Frame::ROUND_LARGE);
-    frame->translation_.z = 0.1;
-    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
-    overlays_[View::MIXING]->attach(frame);
-
-    // extra overlays for geometry view
-    frame = new Frame(Frame::SHARP_LARGE);
-    frame->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
-    overlays_[View::GEOMETRY]->attach(frame);
-    resize_handle_ = new Handles(Handles::RESIZE);
-    resize_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
-    resize_handle_->translation_.z = 0.1;
-    overlays_[View::GEOMETRY]->attach(resize_handle_);
-    resize_H_handle_ = new Handles(Handles::RESIZE_H);
-    resize_H_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
-    resize_H_handle_->translation_.z = 0.1;
-    overlays_[View::GEOMETRY]->attach(resize_H_handle_);
-    resize_V_handle_ = new Handles(Handles::RESIZE_V);
-    resize_V_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
-    resize_V_handle_->translation_.z = 0.1;
-    overlays_[View::GEOMETRY]->attach(resize_V_handle_);
-    rotate_handle_ = new Handles(Handles::ROTATE);
-    rotate_handle_->color = glm::vec4( COLOR_DEFAULT_SOURCE, 1.f);
-    rotate_handle_->translation_.z = 0.1;
-    overlays_[View::GEOMETRY]->attach(rotate_handle_);
-
-}
-
-MediaSource::~MediaSource()
-{
-    // TODO delete media surface with visitor
-    delete mediasurface_;
-
-    delete mediaplayer_;
-    // TODO verify that all surfaces and node is deleted in Source destructor
-}
-
-void MediaSource::setPath(const std::string &p)
-{
-    path_ = p;
-    mediaplayer_->open(path_);
-    mediaplayer_->play(true);
-
-    Log::Notify("Opening %s", p.c_str());
-}
-
-std::string MediaSource::path() const
-{
-    return path_;
-}
-
-MediaPlayer *MediaSource::mediaplayer() const
-{
-    return mediaplayer_;
-}
-
-bool MediaSource::failed() const
-{
-    return mediaplayer_->failed();
-}
-
-void MediaSource::init()
-{
-    if ( mediaplayer_->isOpen() ) {
-
-        // update video
-        mediaplayer_->update();
-
-        // once the texture of media player is created
-        if (mediaplayer_->texture() != Resource::getTextureBlack()) {
-
-            // get the texture index from media player, apply it to the media surface
-            mediasurface_->setTextureIndex( mediaplayer_->texture() );
-
-            // create Frame buffer matching size of media player
-            float height = float(mediaplayer()->width()) / mediaplayer()->aspectRatio();
-            renderbuffer_ = new FrameBuffer(mediaplayer()->width(), (uint)height);
-
-//            // setup shader resolution for texture 0
-//            rendershader_->iChannelResolution[0] = glm::vec3(mediaplayer()->width(), mediaplayer()->height(), 0.f);
-
-            // create the surfaces to draw the frame buffer in the views
-            // TODO Provide the source custom effect shader
-            rendersurface_ = new FrameBufferSurface(renderbuffer_, blendingshader_);
-            groups_[View::RENDERING]->attach(rendersurface_);
-            groups_[View::GEOMETRY]->attach(rendersurface_);
-            groups_[View::MIXING]->attach(rendersurface_);
-            groups_[View::LAYER]->attach(rendersurface_);
-
-            // for mixing view, add another surface to overlay (for stippled view in transparency)
-            Surface *surfacemix = new FrameBufferSurface(renderbuffer_);
-            ImageShader *is = static_cast<ImageShader *>(surfacemix->shader());
-            if (is)  is->stipple = 1.0;
-            groups_[View::MIXING]->attach(surfacemix);
-            groups_[View::LAYER]->attach(surfacemix);
-            if (mediaplayer_->duration() == GST_CLOCK_TIME_NONE)
-                overlays_[View::MIXING]->attach( new Mesh("mesh/icon_image.ply") );
-            else
-                overlays_[View::MIXING]->attach( new Mesh("mesh/icon_video.ply") );
-
-            // scale all mixing nodes to match aspect ratio of the media
-            for (NodeSet::iterator node = groups_[View::MIXING]->begin();
-                 node != groups_[View::MIXING]->end(); node++) {
-                (*node)->scale_.x = mediaplayer_->aspectRatio();
-            }
-            for (NodeSet::iterator node = groups_[View::GEOMETRY]->begin();
-                 node != groups_[View::GEOMETRY]->end(); node++) {
-                (*node)->scale_.x = mediaplayer_->aspectRatio();
-            }
-            for (NodeSet::iterator node = groups_[View::LAYER]->begin();
-                 node != groups_[View::LAYER]->end(); node++) {
-                (*node)->scale_.x = mediaplayer_->aspectRatio();
-            }
-
-            // done init once and for all
-            initialized_ = true;
-            // make visible
-            groups_[View::RENDERING]->visible_ = true;
-            groups_[View::MIXING]->visible_ = true;
-            groups_[View::GEOMETRY]->visible_ = true;
-            groups_[View::LAYER]->visible_ = true;
-        }
-    }
-
-}
-
-void MediaSource::render()
-{
-    if (!initialized_)
-        init();
-    else {
-        // update video
-        mediaplayer_->update();
-
-        // render the media player into frame buffer
-        static glm::mat4 projection = glm::ortho(-1.f, 1.f, 1.f, -1.f, -1.f, 1.f);
-        renderbuffer_->begin();
-        mediasurface_->draw(glm::identity<glm::mat4>(), projection);
-        renderbuffer_->end();
-    }
-}
-
-FrameBuffer *MediaSource::frame() const
-{
-    if (initialized_ && renderbuffer_)
-    {
-        return renderbuffer_;
-    }
-    else {
-        static FrameBuffer *black = new FrameBuffer(640,480);
-        return black;
-    }
-
-}
-
-void MediaSource::accept(Visitor& v)
-{
-    Source::accept(v);
-    v.visit(*this);
-}
diff --git a/Source.h b/Source.h
index d4beedb..1e592eb 100644
--- a/Source.h
+++ b/Source.h
@@ -14,6 +14,7 @@ class FrameBuffer;
 class FrameBufferSurface;
 class MediaPlayer;
 class Surface;
+class Session;
 class Frame;
 
 class Source
@@ -43,12 +44,12 @@ public:
     // a Source has a shader to control mixing effects
     inline ImageShader *blendingShader() const { return blendingshader_; }
 
-    // a Source shall be updated before displayed (Mixing, Geometry and Layer)
-    void update (float dt);
-
     // touch to request update
     inline void touch() { need_update_ = true; }
 
+    // a Source shall be updated before displayed (Mixing, Geometry and Layer)
+    void update (float dt);
+
     // accept all kind of visitors
     virtual void accept (Visitor& v);
 
@@ -95,6 +96,7 @@ protected:
 
     // update need
     bool need_update_;
+    float dt_;
 };
 
 // TODO SourceSet sorted by shader
@@ -122,32 +124,5 @@ private:
     Node *_n;
 };
 
-class MediaSource : public Source
-{
-public:
-    MediaSource();
-    ~MediaSource();
-
-    // implementation of source API
-    FrameBuffer *frame() const override;
-    void render() override;
-    void accept (Visitor& v) override;
-    bool failed() const override;
-
-    // Media specific interface
-    void setPath(const std::string &p);
-    std::string path() const;
-    MediaPlayer *mediaplayer() const;
-
-protected:
-
-    void init() override;
-
-    Surface *mediasurface_;
-    std::string path_;
-    MediaPlayer *mediaplayer_;
-};
-
-// TODO dedicated source .cpp .h files for MediaSource
 
 #endif // SOURCE_H
diff --git a/UserInterfaceManager.cpp b/UserInterfaceManager.cpp
index 1ea7ae1..7373da3 100644
--- a/UserInterfaceManager.cpp
+++ b/UserInterfaceManager.cpp
@@ -44,6 +44,7 @@
 #include "Mixer.h"
 #include "FrameBuffer.h"
 #include "MediaPlayer.h"
+#include "MediaSource.h"
 #include "PickingVisitor.h"
 #include "ImageShader.h"
 #include "ImageProcessingShader.h"
@@ -58,14 +59,14 @@ void ShowAbout(bool* p_open);
 
 // static objects for multithreaded file dialog
 static std::atomic<bool> FileDialogPending_ = false;
-static std::atomic<bool> FileDialogLoadFinished_ = false;
-static std::atomic<bool> FileDialogSaveFinished_ = false;
-static std::string FileDialogFilename_ = "";
+static std::atomic<bool> SessionFileDialogLoadFinished_ = false;
+static std::atomic<bool> SessionFileDialogSaveFinished_ = false;
+static std::string SessionFileDialogFilename_ = "";
 
-static void FileDialogOpen(std::string path)
+static void SessionFileDialogOpen(std::string path)
 {
      FileDialogPending_ = true;
-     FileDialogLoadFinished_ = false;
+     SessionFileDialogLoadFinished_ = false;
 
      char const * open_file_name;
      char const * open_pattern[1] = { "*.vmx" };
@@ -73,17 +74,17 @@ static void FileDialogOpen(std::string path)
      open_file_name = tinyfd_openFileDialog( "Open a session file", path.c_str(), 1, open_pattern, "vimix session", 0);
 
      if (!open_file_name)
-        FileDialogFilename_ = "";
+        SessionFileDialogFilename_ = "";
      else
-        FileDialogFilename_ = std::string( open_file_name );
+        SessionFileDialogFilename_ = std::string( open_file_name );
 
-     FileDialogLoadFinished_ = true;
+     SessionFileDialogLoadFinished_ = true;
 }
 
-static void FileDialogSave(std::string path)
+static void SessionFileDialogSave(std::string path)
 {
      FileDialogPending_ = true;
-     FileDialogSaveFinished_ = false;
+     SessionFileDialogSaveFinished_ = false;
 
      char const * save_file_name;
      char const * save_pattern[1] = { "*.vmx" };
@@ -91,37 +92,32 @@ static void FileDialogSave(std::string path)
      save_file_name = tinyfd_saveFileDialog( "Save a session file", path.c_str(), 1, save_pattern, "vimix session");
 
      if (!save_file_name)
-        FileDialogFilename_ = "";
+        SessionFileDialogFilename_ = "";
      else
      {
-        FileDialogFilename_ = std::string( save_file_name );
+        SessionFileDialogFilename_ = std::string( save_file_name );
         // check extension
-        std::string extension = FileDialogFilename_.substr(FileDialogFilename_.find_last_of(".") + 1);
+        std::string extension = SessionFileDialogFilename_.substr(SessionFileDialogFilename_.find_last_of(".") + 1);
         if (extension != "vmx")
-            FileDialogFilename_ += ".vmx";
+            SessionFileDialogFilename_ += ".vmx";
      }
 
-     FileDialogSaveFinished_ = true;
+     SessionFileDialogSaveFinished_ = true;
 }
 
-static std::atomic<bool> MediaDialogFinished_ = false;
-static std::string MediaDialogUri_ = "";
-static void MediaDialogOpen(std::string path)
+static void ImportFileDialogOpen(char *filename, const std::string &path)
 {
-     FileDialogPending_ = true;
-     MediaDialogFinished_ = false;
+    if (FileDialogPending_)
+        return;
+    FileDialogPending_ = true;
 
-     char const * open_file_name;
-     char const * open_pattern[15] = { "*.mp4", "*.mpg", "*.avi", "*.mov", "*.mkv",  "*.webm", "*.mod", "*.wmv", "*.mxf", "*.ogg", "*.flv", "*.asf", "*.jpg", "*.png", "*.gif" };
+    char const * open_pattern[17] = { "*vmx", "*.mp4", "*.mpg", "*.avi", "*.mov", "*.mkv",  "*.webm", "*.mod", "*.wmv", "*.mxf", "*.ogg", "*.flv", "*.asf", "*.jpg", "*.png", "*.gif", "*.svg" };
+    char const * open_file_name;
 
-     open_file_name = tinyfd_openFileDialog( "Open a Media file", path.c_str(), 15, open_pattern, "Video or image", 0);
+    open_file_name = tinyfd_openFileDialog( "Import a file", path.c_str(), 17, open_pattern, "All supported formats", 0);
+    sprintf(filename, "%s", open_file_name);
 
-     if (!open_file_name)
-        MediaDialogUri_ = "";
-     else
-        MediaDialogUri_ = std::string( open_file_name );
-
-     MediaDialogFinished_ = true;
+    FileDialogPending_ = false;
 }
 
 UserInterface::UserInterface()
@@ -211,7 +207,7 @@ void UserInterface::handleKeyboard()
         }
         else if (ImGui::IsKeyPressed( GLFW_KEY_O )) {
             // Open session
-            std::thread (FileDialogOpen, Settings::application.recentSessions.path).detach();
+            std::thread (SessionFileDialogOpen, Settings::application.recentSessions.path).detach();
             navigator.hidePannel();
         }
         else if (ImGui::IsKeyPressed( GLFW_KEY_S )) {
@@ -378,37 +374,29 @@ void UserInterface::NewFrame()
     handleMouse();
 
     // handle FileDialog
-    if (FileDialogLoadFinished_) {
-        FileDialogLoadFinished_ = false;
+    if (SessionFileDialogLoadFinished_) {
+        SessionFileDialogLoadFinished_ = false;
         FileDialogPending_ = false;
-        if (!FileDialogFilename_.empty()) {
-            Mixer::manager().open(FileDialogFilename_);
-            Settings::application.recentSessions.path = SystemToolkit::path_filename(FileDialogFilename_);
+        if (!SessionFileDialogFilename_.empty()) {
+            Mixer::manager().open(SessionFileDialogFilename_);
+            Settings::application.recentSessions.path = SystemToolkit::path_filename(SessionFileDialogFilename_);
         }
     }
-    if (FileDialogSaveFinished_) {
-        FileDialogSaveFinished_ = false;
+    if (SessionFileDialogSaveFinished_) {
+        SessionFileDialogSaveFinished_ = false;
         FileDialogPending_ = false;
-        if (!FileDialogFilename_.empty()) {
-            Mixer::manager().saveas(FileDialogFilename_);
-            Settings::application.recentSessions.path = SystemToolkit::path_filename(FileDialogFilename_);
-        }
-    }
-    if (MediaDialogFinished_) {
-        MediaDialogFinished_ = false;
-        FileDialogPending_ = false;
-        if (!MediaDialogUri_.empty()) {
-            navigator.setMediaUri(MediaDialogUri_);
-            Settings::application.recentMedia.path = SystemToolkit::path_filename(MediaDialogUri_);
+        if (!SessionFileDialogFilename_.empty()) {
+            Mixer::manager().saveas(SessionFileDialogFilename_);
+            Settings::application.recentSessions.path = SystemToolkit::path_filename(SessionFileDialogFilename_);
         }
     }
 
-    // overlay when disabled
+    // overlay to ensure file dialog is modal
     if (FileDialogPending_){
         ImGui::OpenPopup("Busy");
         if (ImGui::BeginPopupModal("Busy", NULL, ImGuiWindowFlags_AlwaysAutoResize))
         {
-            ImGui::Text("Close dialog to resume...");
+            ImGui::Text("Close file dialog box to resume.");
             ImGui::EndPopup();
         }
     }
@@ -480,7 +468,7 @@ void UserInterface::showMenuFile()
 {
     if (ImGui::MenuItem( ICON_FA_FILE_UPLOAD "  Open", "Ctrl+O")) {
         // launch file dialog to open a session file
-        std::thread (FileDialogOpen, Settings::application.recentSessions.path).detach();
+        std::thread (SessionFileDialogOpen, Settings::application.recentSessions.path).detach();
         navigator.hidePannel();
     }
     if (ImGui::MenuItem( ICON_FA_FILE_DOWNLOAD "  Save", "Ctrl+S")) {
@@ -488,7 +476,7 @@ void UserInterface::showMenuFile()
         navigator.hidePannel();
     }
     if (ImGui::MenuItem( ICON_FA_FOLDER_OPEN "  Save as")) {
-        std::thread (FileDialogSave, Settings::application.recentSessions.path).detach();
+        std::thread (SessionFileDialogSave, Settings::application.recentSessions.path).detach();
         navigator.hidePannel();
     }
 
@@ -1061,10 +1049,6 @@ void Navigator::RenderSourcePannel(Source *s)
     ImGui::End();
 }
 
-void Navigator::setMediaUri(std::string path)
-{
-    sprintf(media_path_, "%s", path.c_str());
-}
 
 void Navigator::RenderNewPannel()
 {
@@ -1082,55 +1066,61 @@ void Navigator::RenderNewPannel()
 
         ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
         static int new_source_type = 0;
-        ImGui::Combo("Type", &new_source_type, "Media\0Render\0Clone\0");
+        ImGui::Combo("Origin", &new_source_type, "File\0Software\0Hardware\0");
+
+        // Media Source creation
         if (new_source_type == 0) {
             // helper
             ImGui::SetCursorPosX(pannel_width - 30 + IMGUI_RIGHT_ALIGN);
-            ImGuiToolkit::HelpMarker("A Media source displays an image or a video file.");
-            // browse folder
+            ImGuiToolkit::HelpMarker("Create a source from a file:\n- Video (*.mpg, *mov, *.avi, etc.)\n- Image (*.jpg, *.png, etc.)\n- Vector graphics (*.svg)\n- vimix session (*.vmx)\n\nEquivalent to dropping the file in the workspace.");
+
+            // filename of the media to open
+            static char filename[2048];
+
+            // browse for a filename
             if (ImGuiToolkit::ButtonIcon(2, 5)) {
-                std::thread (MediaDialogOpen, Settings::application.recentMedia.path).detach();
+                std::thread (ImportFileDialogOpen, filename, Settings::application.recentImport.path).detach();
             }
-            // combo recent
+            // combo of recent media filenames
             ImGui::SameLine(0, 10);
             ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
-            if (ImGui::BeginCombo("##RecentMedia", "Select recent"))
+            if (ImGui::BeginCombo("##RecentImport", "Select recent"))
             {
-                std::for_each(Settings::application.recentMedia.filenames.begin(),
-                              Settings::application.recentMedia.filenames.end(), [](std::string& path) {
+                std::for_each(Settings::application.recentImport.filenames.begin(),
+                              Settings::application.recentImport.filenames.end(), [](std::string& path) {
                     int right = MIN( 40, path.size());
                     if (ImGui::Selectable( path.substr( path.size() - right ).c_str() )) {
-                        UserInterface::manager().navigator.setMediaUri(path);
+                        sprintf(filename, "%s", path.c_str());
                     }
                 });
                 ImGui::EndCombo();
             }
-            // uri text entry
+            // filename text entry - [Return] to validate
             ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
-            if (ImGui::InputText("Path", media_path_, IM_ARRAYSIZE(media_path_), ImGuiInputTextFlags_EnterReturnsTrue) ) {
-                Mixer::manager().createSourceMedia(media_path_);
+            if (ImGui::InputText("Path", filename, IM_ARRAYSIZE(filename), ImGuiInputTextFlags_EnterReturnsTrue) ) {
+                Mixer::manager().createSourceFile( std::string(filename) );
                 selected_button[NAV_NEW] = false;
             }
-
-            // Validate button
+            // or press Validate button
             ImGui::Text(" ");
             if ( ImGui::Button("Create !", ImVec2(pannel_width - padding_width, 0)) ) {
-
-                if ( SystemToolkit::file_exists(media_path_) ) {
-                    Mixer::manager().createSourceMedia(media_path_);
-                    selected_button[NAV_NEW] = false;
-                }
+                Mixer::manager().createSourceFile( std::string(filename) );
+                selected_button[NAV_NEW] = false;
             }
         }
+        // Render Source creator
         else if (new_source_type == 1){
+
             // helper
             ImGui::SetCursorPosX(pannel_width - 30 + IMGUI_RIGHT_ALIGN);
-            ImGuiToolkit::HelpMarker("A Render source replicates the rendering of the output.");
+            ImGuiToolkit::HelpMarker("Create a source from a software algorithm or from vimix objects.");
+
         }
+        // Hardware
         else {
             // helper
             ImGui::SetCursorPosX(pannel_width - 30 + IMGUI_RIGHT_ALIGN);
-            ImGuiToolkit::HelpMarker("A Clone source duplicates the content of another source.");
+            ImGuiToolkit::HelpMarker("Create a source capturing images from an external hardware.");
         }
 
     }
diff --git a/UserInterfaceManager.h b/UserInterfaceManager.h
index 24ab27d..84205d7 100644
--- a/UserInterfaceManager.h
+++ b/UserInterfaceManager.h
@@ -33,8 +33,6 @@ class Navigator
     void RenderNewPannel();
     void RenderMainPannel();
 
-    char media_path_[1024];
-
 public:
     Navigator();
 
@@ -43,7 +41,6 @@ public:
     void showPannelSource(int index);
     void Render();
 
-    void setMediaUri(std::string path);
 };
 
 class ToolBox
diff --git a/View.cpp b/View.cpp
index 5ccf2df..641f236 100644
--- a/View.cpp
+++ b/View.cpp
@@ -304,6 +304,7 @@ void GeometryView::grab (glm::vec2 from, glm::vec2 to, Source *s, std::pair<Node
                 S_resize.y = S_resize.x;
             sourceNode->scale_ = start_scale * S_resize;
 
+            Log::Info(" resize            ( %.1f, %.1f ) ", S_resize.x, S_resize.y);
 //            glm::vec3 factor = S_resize * glm::vec3(0.5f, 0.5f, 1.f);
 ////            glm::vec3 factor = S_resize * glm::vec3(1.f, 1.f, 1.f);
 ////            factor *= glm::sign( glm::vec3(pick.second, 1.f) );
diff --git a/defines.h b/defines.h
index 15b5e91..8a532d5 100644
--- a/defines.h
+++ b/defines.h
@@ -8,7 +8,7 @@
 #define APP_VERSION_MINOR 1
 #define XML_VERSION_MAJOR 0
 #define XML_VERSION_MINOR 1
-#define MAX_RECENT_HISTORY 10
+#define MAX_RECENT_HISTORY 16
 
 #define MINI(a, b)  (((a) < (b)) ? (a) : (b))
 #define MAXI(a, b)  (((a) > (b)) ? (a) : (b))