Polygon Mode

  • Click to draw a point.
  • Keep clicking to draw a shape.
  • End the shape by connecting it to the origin node without crossing any lines.

Pencil Mode

  • Shift-click to start drawing.
  • Move the mouse to draw the shape.
  • End the shape by mousing over the origin and clicking.


  • Holding ctrl will display all the handles of each polygon.
  • Ctrl-click on a handle to delete it.
  • Ctrl-click on a line to insert a new handle.
  • Release ctrl and drag a handle to move it.