Note: Retiring online help, in favor of improved in-game tutorials. So aside from Changes, these help files are no longer maintained.
Move mode (end Paint or Delete mode).
Paint mode. Click on shape to paint current color.
Delete mode. Click on shape to delete it.
Direction of click-to-rotate on Move mode.
Colors (paint, edge, background).
Zoom to fit.
Center drawing on screen.
Undo, if any.
Redo, if any.
Cursor modes and zoom buttons may be on slide-out menus, if space is tight.
The button that opens the menu, also closes it.