I used the rotation and zoom in windows 10 and now I don't see a way to get the canvas back to straight horizontal state. Is there a shortcut to just have the canvas jump back to normal viewing state so I don't have to keep rotating back and forth trying to get to 0 degree angle? Also is there a shortcut to jump back to pagefit viewing size with some border around the canvas?
I don't think this is currently possible to do quickly.
I agree a reset zoom/rotation button would be very helpful. I would suggest adding to the Fresco Uservoice page a similar post has been created for this type of addition here.