There are times when I would like to put some temporary non-copper traces on my PCB to help with placement, or mark temporary keepout areas that I will remove once I don’t need them anymore.
I tried using a variety of trace types and layers (eg fab) but I would get the “not on copper layers” error message.
I have resorted to using top and bottom copper traces, but this is not a satisfying solution. I cannot run traces that intersect, which means I need to remove my registration traces before I am done with them.
Why can I not use fab lines on copper layers?