User blog comment:Princess Shadinella/Question About Categories/@comment-27924856-20171230164047

-> Categories section at bottom of OC page (above comment section)

-> "Add category" button

-> Name of category you want to create or add (eg: Princess Shadinella's Fanon); press enter/return when done

-> Save

Alternatively, you could also do pretty much the same thing in visual and source editor.