I often use full screen editing to adjust my designs to larger screen sizes.
Sometimes things have to be adjusted and so I start editing elements and values in full screen mode. Of course not everything I do is correct the first time I try. Unfortunately it is not always possible to revert the designs to the previous state, especially when trying several ideas. To redo my attempts I then have to switch back to smaller view and use "undo".
So it would be great to also have the undo/redo buttons in this mode to save time and have the best possible use for full screen editing.