diff --git a/PROCESSING 3/slitscan/slitscan.pde b/PROCESSING 3/slitscan/slitscan.pde
index 80cb1f2..40e5f62 100644
--- a/PROCESSING 3/slitscan/slitscan.pde	
+++ b/PROCESSING 3/slitscan/slitscan.pde	
@@ -64,6 +64,7 @@ void setup() {
     newh = (int)(max_display_size / ratio);
   }
 
+  surface.setResizable(true);
   surface.setSize(neww, newh);
  
   for(int i=0;i<32;i++) {