Hi! I’m enjoying Affinity Photo, but have a question about the undo brush (or history brush not sure the official name). When I use it on a pixel layer it appears to work fine at first. But then if I hide the underlying layers (or look at the resulting thumbnail image in the layers panel), it becomes clear that the undo brush has, while performing the undo function, also cloned everything it’s touched from the underlying layers. So areas that were originally clear in the layer on which I was using the brush are now filled in with colors from below, creating a problem for further editing of the image.
Could someone please let me know, is there any way to set the undo brush to leave clear areas on a layer clear, and not fill them in with content from the underlying layers?
Thanks in advance!