Photoshop for iPad: Undo Button

I see that the Undo button for Photoshop for iPad is in the upper right of the UI (or a 2-finger tap).  Is there any way to customize the UI to put the Undo button in the lower left?  

I am right-handed, so I hold the pen with this hand and would like to use my left hand to hold the iPad and do Undo, (as you would see in Procreate or the hidden lower-left corner button in Sketchbook for ipad)--- see attached. 

I like actual buttons that I can press without looking every time. vs. the gestures,

I press Undo a lot, so it's too slow and annoying to do the gestures or go to the top-right.

Thanks!