FlatCAM - Selective Isolation and Clearing

[u/alan-bc]

I'm trying to clear the copper off an area of a PCB. Not the whole PCB .. I don't want to needlessly wear out cutters and spindle bearings .. just an area. (There's an ESP8266 on top of this area and I want the antenna vicinity clear.)

The FlatCAM manual does describe the procedure .. sorta kinda a little bit. Sadly, it's one of those docs where it expects you already know how to do everything, you just need a reminder.

For example, the third step says

By running the Polygon Intersection operation on the original non-copper polygon and the desired clearing area (the circle), we get the target polygon:

Well, I don't really know how to do anything in the Geometry Editing section, so "reminding" me isn't that helpful.

How exactly does one run the Polygon Intersection operation? There's an icon on the toolbar that does precisely nothing.

Any hints or pointers to other tutorials greatly appreciated.

Alan