In which layer to put a hole

[daviddlc]

I'm doing my own part, but I don't know which layer to use to put a hole.

Please help me out with this issue.

Please consider is on the library part.

Added after 27 minutes:

mmm I see that this went to a different part of the forum.

Anyway, the question was for Eagle.

 

[CMOS]

Normally a drill for pad goes through all the layers while a drill for via may or may not go through all the layers.

In Eagle if you want to place a pad, it will be on layer 17 (can be done only in library editor). On PCB layout, a pad will be placed on layer 18 (Vias).