Full screen editing in PHOTO-PAINT?

In the X5 suite, is there any way to get maximum screen real estate while editing photos in PHOTO-PAINT? I'd like to get rid of the Windows task bar and any unnecessary menu bars in PHOTO-PAINT, so I can score more screen. Just imagine pressing F9 and then being able to edit. Since I can't afford a 48" 4K monitor, I really need help!!!

Funny thing is that I remember doing this by accident with previous versions, then looking up how to get the menus back online!

 

Thanks for any help!