how to change skin without texture pack on pojavlauncher

Описание: Hello im Vonph from the philippines

i have server on 1.17.1 and 1.16.5 (vannila)
Everyone can join but pls dont ruin the server

Rules

Be online

No stealing

No useless build

No swearing

no hacks

You can build shops

PvP is enable but pls dont abuse

No need for premium account