The PCB fab house I intend to use requires that all ground and power planes be printed in negative in the Gerber files. (See http://www.pcbfabexpress.com/faq.jsp#q10.) They say that most CAD software does this by default, but I don't see any mention of it in the manual. I can see that I can select "invert" when printing the Gerber files, but I don't see any way to specify particular layers to be inverted but not others. I suppose I could print twice, once inverted and once normal, and then just ship them the right file for each layer, but this seems like a pain. Is there an easier way?
Thanks in advance, Randall Nortman
