diff -r 5f388e514ab8 -r 77ef8bef0593 src/Tools/Graphview/graph_panel.scala
--- a/src/Tools/Graphview/graph_panel.scala	Thu Mar 04 19:55:52 2021 +0100
+++ b/src/Tools/Graphview/graph_panel.scala	Thu Mar 04 21:04:27 2021 +0100
@@ -341,8 +341,8 @@
     tooltip = "Use editor font and colors for painting"
   }
 
-  private val colorations = new Button { action = Action("Colorations") { color_dialog.open } }
-  private val filters = new Button { action = Action("Filters") { mutator_dialog.open } }
+  private val colorations = new Button { action = Action("Colorations") { color_dialog.open() } }
+  private val filters = new Button { action = Action("Filters") { mutator_dialog.open() } }
 
   private val controls =
     Wrap_Panel(