Adding rank pictures

How do I put in pictures for Admin, Mods, Members etc. that show up on peoples posts.

Ive looked all throughout the display tab and I cant find where I can add them at.

EDIT: I want to put in User Rank pictures, these to be exact: https://help.forumotion.com/self-service-gallery-f9/rankimages-by-hellboy-t21011.htm <-- Maybe that will help you know what im talking about.

You make a rank. Users&Groups>Rank Administration>Make a rank for each position you want> enter the info> finally enter the URL of the rank where it asks.

Go into the profile(in the Admin panel) that you want to have the rank bar on. Scroll to the bottom of the page and select the rank you want that person to have.

Press Save.