Clip Studio Paint: Display Screen Too Small

I’m using the 12.9 iPad Pro with a MacBook Air for Clip Studio Paint. The display screen doesn’t reach around the edges of my iPad and the controls are hard to see. I have to use my Mac for most of the controls, which somewhat defeats the purpose of trying to work from my iPad. Is there any way to expand the display so that it covers more area on the screen? The zoom feature in the sidebar just doesn’t seem to do any good.

I’m using a 2015 MacBook Air and the newest iPad Pro 12.9