Tried searching didn't find anything about this specifically.
I want to remove the annular rings on my vias for the layers which they don't have connections on.
I know how to do this with the gerbers, but that causes problems with my polygons.
Underneath my BGA (0.65mm) the vias are close enough together that without removing the annular rings on the internal layers that don't have an connection the polygon can't connect between vias - like this.
I can do this manually by physically selecting the vias which don't have a connection on the internal layer in question and setting them to have 0 pad size on that layer.
You can use find similar to select them all at once and then change them with PCB inspector or set up a via style - of cource this dosn't help if you have already placed them all.
Is the gerber feature you are talking about remove un-used pads from internal layers?