For example i edit a picture on my project to make it darker...i wish i had a toggle to see what it looked like before i made all the enhancement changes in the tab im on. Or even individual enhancement changes on each editing tool (contrast, brightness, color, ect). Maybe by holding down on the picture to see the before?

And/Or if say you put an icon small in the corner and then move it and make it bigger...if i go back a step to change it back to small and then tweak it..i now lost the ability to go back to the way i had it..so it would be nice to have a toggle instead to see before and after.