Hello Bill,
I know you've pleaded for members not to tell you this, but there's
no option to unerase in the Layers module
In many other areas of PhD, an erased or modified section can be "brought back" be reversing the tool & brushing it back in. That's not the case in Layers. Sorry.
In the screenshot some stray grains of sand needed to be erased from the border. The
only option to unerase was the
Undo button. I'm fairly sure that would be next to useless in your current project!
PIX
PIX YouTube channel