Ability to edit engagement size when editing in-app

Right now, I can only edit the size of an engagement in the editor mode. I’d like to be able to do so when editing in-app. This would be especially useful when editing tooltip size because in context I might see that something needs to be a different size. 

+1! This would be incredibly useful instead of having to continuously jump back and forth between PX and the source page when configuring sizing and design.