diff --git a/build/shared/lib/defaults.txt b/build/shared/lib/defaults.txt
index bfd5332fb..67a3693d9 100644
--- a/build/shared/lib/defaults.txt
+++ b/build/shared/lib/defaults.txt
@@ -101,6 +101,8 @@ editor.window.height.min = 500
 editor.window.height.min.macosx = 450
 # tested to be 515 on Windows XP, this leaves some room
 editor.window.height.min.windows = 530
+# tested with Raspberry Pi display
+editor.window.height.min.linux = 480
 
 # font size for editor
 #editor.font = Monospaced,plain,12
diff --git a/core/src/processing/awt/PSurfaceAWT.java b/core/src/processing/awt/PSurfaceAWT.java
index 500c29b15..1b40ea274 100644
--- a/core/src/processing/awt/PSurfaceAWT.java
+++ b/core/src/processing/awt/PSurfaceAWT.java
@@ -886,15 +886,19 @@ public class PSurfaceAWT extends PSurfaceNone {
           // if it fits inside the editor window,
           // offset slightly from upper lefthand corner
           // so that it's plunked inside the text area
-          locationX = editorLocation[0] + 66;
-          locationY = editorLocation[1] + 66;
+          //locationX = editorLocation[0] + 66;
+          //locationY = editorLocation[1] + 66;
+          locationX = (sketch.displayWidth - window.width) / 2;
+          locationY = (sketch.displayHeight - window.height) / 2;
 
+          /*
           if ((locationX + window.width > sketch.displayWidth - 33) ||
             (locationY + window.height > sketch.displayHeight - 33)) {
             // otherwise center on screen
             locationX = (sketch.displayWidth - window.width) / 2;
             locationY = (sketch.displayHeight - window.height) / 2;
           }
+          */
           frame.setLocation(locationX, locationY);
         }
       } else {  // just center on screen
diff --git a/core/src/processing/javafx/PSurfaceFX.java b/core/src/processing/javafx/PSurfaceFX.java
index 6cb3156b5..704eef949 100644
--- a/core/src/processing/javafx/PSurfaceFX.java
+++ b/core/src/processing/javafx/PSurfaceFX.java
@@ -466,6 +466,7 @@ public class PSurfaceFX implements PSurface {
         stage.setY(locationY);
 
       } else {  // doesn't fit
+        /*
         // if it fits inside the editor window,
         // offset slightly from upper lefthand corner
         // so that it's plunked inside the text area
@@ -475,9 +476,12 @@ public class PSurfaceFX implements PSurface {
         if ((locationX + stage.getWidth() > sketch.displayWidth - 33) ||
             (locationY + stage.getHeight() > sketch.displayHeight - 33)) {
           // otherwise center on screen
-          locationX = (int) ((sketch.displayWidth - stage.getWidth()) / 2);
-          locationY = (int) ((sketch.displayHeight - stage.getHeight()) / 2);
+        */
+        locationX = (int) ((sketch.displayWidth - stage.getWidth()) / 2);
+        locationY = (int) ((sketch.displayHeight - stage.getHeight()) / 2);
+        /*
         }
+        */
         stage.setX(locationX);
         stage.setY(locationY);
       }
@@ -951,4 +955,4 @@ public class PSurfaceFX implements PSurface {
     if (ch.startsWith("\r")) return '\n'; // normalize enter key
     return ch.charAt(0);
   }
-}
\ No newline at end of file
+}
diff --git a/core/src/processing/opengl/PSurfaceJOGL.java b/core/src/processing/opengl/PSurfaceJOGL.java
index ba6429998..cb5166453 100644
--- a/core/src/processing/opengl/PSurfaceJOGL.java
+++ b/core/src/processing/opengl/PSurfaceJOGL.java
@@ -540,6 +540,7 @@ public class PSurfaceJOGL implements PSurface {
         window.setTopLevelPosition(locationX - w, locationY);
 
       } else {  // doesn't fit
+        /*
         // if it fits inside the editor window,
         // offset slightly from upper lefthand corner
         // so that it's plunked inside the text area
@@ -549,9 +550,12 @@ public class PSurfaceJOGL implements PSurface {
         if ((locationX + w > sketch.displayWidth - 33) ||
             (locationY + h > sketch.displayHeight - 33)) {
           // otherwise center on screen
-          locationX = (sketch.displayWidth - w) / 2;
-          locationY = (sketch.displayHeight - h) / 2;
+        */
+        locationX = (sketch.displayWidth - w) / 2;
+        locationY = (sketch.displayHeight - h) / 2;
+        /*
         }
+        */
         window.setTopLevelPosition(locationX, locationY);
       }
     } else {  // just center on screen
diff --git a/core/todo.txt b/core/todo.txt
index 3812dc453..c48cc3bd8 100644
--- a/core/todo.txt
+++ b/core/todo.txt
@@ -20,6 +20,10 @@ X Fix depth sorter ordering when two triangles in a plane share vertices
 X   https://github.com/processing/processing/pull/4010
 X Turn off fixed rate scheduling in OpenGL
 X   https://github.com/processing/processing/pull/4004
+X Fix GLSL preprocessing issues with variable name mangling
+X   https://github.com/processing/processing/pull/4052
+X   https://github.com/processing/processing/issues/3961
+X   https://github.com/processing/processing/issues/3968
 
 andres
 X cursor() fails to work as expected with P2D/P3D