I want to learn how to use eagle and thought about creating my own raspberry pi t-cobbler. I would like to put everything on a single sided pcb for etching.I add two 40 pin ide connector's from con-harting library but I am having trouble figuring out how to run the traces make the pads with holes in the center for drilling. Also how can I make it so that when i etch it can leave the pin numbers in the copper in other words mask the pin numbers so they do not get eaten away from etchant.
