Board Thread:Support Requests - Designing Your Wiki/@comment-35275294-20200616030510

So...uh I'm making a Wikia for my fanfic info, and I have a problems for making the infobox. I know how to use it but how to modify it? How to add a border for the infobox? (I encircle the part that I want to modify in my Infobox)

Example (from GTA Fandom):  