I always use Ctrl + Space bar to hide all of the control and editor Windows when I am working so that I have a clear screen. It would be great if there was an option to keep the shelves visible all the time in the same way that the palette stays visible. I very rarely use the palette but having access to all my usual tools in my shelves at all times would be perfect. You can then toggle all the other Windows as before and use full screen for a true clear screen.
Thanks.