One end of the pin will look slightly smaller as you look at the side of the shaft, you might need a magnifying glass to tell sometimes.
I keep a scrap piece of 2x4 handy with a hole drilled drilled in it, when I need to drive a pin or something out I just put it over the hole and rest the shaft on the 2x4 and tap on it..
A simple pin punch
https://www.amazon.com/Mayhew-Pro-21.../dp/B00065UJWS
It's used to drive out ...pins...