Hey so I'm making a my comic book myself. I'm about 12 pages in. How do I add that <<< PREV|FIRST|NEXT>>> feature?

super simple! you're going to want to use the square brackets -> [ ] these guys
then you're going to want to get your image ID number (the little number in the furaffinity URL that is associated with each individual post)
you format it like this
[ID# OF PREVIOUS POST, ID# OF FIRST POST, ID# OF NEXT POST]
but instead of typing any of the words, you JUST do the ID numbers and the commas inside the square brackets
i hope that makes sense!!