Hello! I have a suggestion for the new update in Gdevelop, a rotating tool for objects and shortcut keys (customizable), like shortcut key for rename 
. I hope my suggestion would be added in the next update. 
, thanks for reading!
Hi,
Click on an object and you should find the Angle field in the left pane.
I suppose you would like a shortcut for 90° rotations, because degree by degree, it wouldn’t be very handy.