Firstly, I’ll be using a blue solder mask, although the same technique can be applied to green, red, yellow, white, or black soldermask. Secondly, this is Eagle, and I’m going to do the ...

Open an the .sch file in Eagle, and run one of the scripts from the File->Script dialog. Alternatively, copy the scripts into the Eagle/ulp directory and run them from the command-line: $ cd ...