- 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.
- 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.