Seems quick at face value, but it isn't, so I won't be able to do it in this batch of changes. The problem is that each additional button added to the Preview screen (once above the message and once below counts as a single button) increase, by an order of magnitude, the number of routines I have to make the change to.
Preview is a house of cards that's surprisingly stable, but it'll have to be rebuilt eventually. The basement design is flawed. My fault.