My suggested way to manage this, is to simply allow multiple layer plot selections.
Easy to explain, and many variant uses are possible.
User selects layer (usually 1) to PLOT DARK.
Then they select layer (usually 1) to PLOT CLEAR, and the plot routine appends the second gerber, with the %LPC% command header.
Of course, this is user-beware stuff, and any LPC WILL blindly 'cut into' what you already have, so this MUST be checked in GerbView, that it really did what user hoped :)
See also the older /bugs.launchpad .net/kicad/ +bug/1463857
https:/
My suggested way to manage this, is to simply allow multiple layer plot selections.
Easy to explain, and many variant uses are possible.
User selects layer (usually 1) to PLOT DARK.
Then they select layer (usually 1) to PLOT CLEAR, and the plot routine appends the second gerber, with the %LPC% command header.
Of course, this is user-beware stuff, and any LPC WILL blindly 'cut into' what you already have, so this MUST be checked in GerbView, that it really did what user hoped :)