PC AFK?

Hey all. I'm thinking of playing this at some point and doing some forward thinking.

I primarily play on console and will do for this as well, however I do have a 2-in-1 PC which can run most games.

I do have a titan two device (like a CM) and idle some simple things, though I saw in some threads/comments on here that you can AFK a number of things on PC.

Can anyone provide a list of what they are (I'm guessing the kills) and how to do it?

I don't think you AFK anything, unless you use macros that is

If I'm wrong please tell me how, because I would like to know.