Right now you must go to Tools --> Options --> View --> Use checkerboard pattern as background
Which is far from a quick toggle.. The option to toggle the Checkerboard background is not even available in the View menu..
So I recommend:
1. Add a toggle option in View menu for the checkerboard

2. Add a new Command option so that we are able to add it in the toolbar!
cmd_EnableCheckerboard [ Quick Toggle Checkerboard Background ]
