Hi Philippe, it could be great that the undo function ( via Menu/Edit/Undo )
could integrate the historical of action and show the name of last action
So that when you don't know if an action was succesfully completed ( eg: adding or suppressing a layer by mistake ), we could refer to the undo characteristic instead of browsing the whole patch to see were a change occured...
I use backspace a lot and deletion are sometimes hard to realize...
Many thanks for your work !
Regards