Link and button

Before, when I unlinked a layer, the links on the other layers would remain; now, if I want to unlink the last layer so I can duplicate it, all the links on those layers disappear. It’s a bit of a nuisance…

It would also be good to have buttons for undoing and redoing, because sometimes I try to do it with my fingers and it doesn’t work – the software gets confused and I can’t undo something that’s been deleted, for example, so I have to start again.