gg=G

Vim commands look weird. They are about muscle memory more than looking like something you can actually read.

• gg=G applies your indent settings to your entire file using your current formatting settings.
• gg takes you to the top of the file.
• = applies the indent settings
• G takes you to the bottom

You can also just hit == on a single line to reindent that line. Or you can use 5== to alter the following 5 lines.

You know, normal vim things.