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I have a .brd file (Allegro 16.5) that I want to use as a template for a new board. I would like to remove all electrical components and netlist and leave behind mounting hole, etc. I would then like to use this template for a new design. Any clues how I am to delete components and nets from existing design?
You could make a copy of the SCH and delete all the necessary items. Then package the PCB to that new SCH and you should be good.
You're supposed to be able to save the board outline as a mechanical part. But, its faster to Export an EMN/IDF file, re-import it to a new board.
Only trick is you have to understand how the export Filter function works (check the box to disable sending that information) or it will bring ALL the components back in, unconnected.
Worst case, the IDF file is human-readable. Text-edit it before importing.