From the author's README on Thunderstore

FullBodyView - QOL

This plugin adds a customisable/rebindable button to toggle camera view when browsing apparel. Toggles view between the slot preview camera and the full body "costume" camera positions, useful for viewing an entire outfit whilst changing shoes/accessories.

Defaults are Y on pad, F6 on keyboard - these can be changed in Reskate INS Menu > Settings > Plugins

Button can be resized or toggled off entirely.

Enjoy!!

Install FullBodyView

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for FullBodyView and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.