     else
       @mainCtx.clearRect @scrollOffsets.main.x, @scrollOffsets.main.y, @mainCanvas.width, @mainCanvas.height
 
-  Editor::setTopNubbyStyle = (height = TOP_TAB_HEIGHT, color = '#EBEBEB') ->
+  Editor::setTopNubbyStyle = (height = 10, color = '#EBEBEB') ->
     @nubbyHeight = Math.max(0, height); @nubbyColor = color
 
     @topNubbyPath = new @draw.Path()

  PALETTE_LEFT_MARGIN = 5
  DEFAULT_INDENT_DEPTH = '  '
  ANIMATION_FRAME_RATE = 60
  TOP_TAB_HEIGHT = 10
  DISCOURAGE_DROP_TIMEOUT = 1000
  MAX_DROP_DISTANCE = 100


        treeView.bounds[line].height
      ]

      treeView.layout 0, @nubbyHeight

      newp = deepCopy [
        treeView.glue[line - 1],
