Press B in Moon Animator 2 to toggle onion skinning off. If you want to clear all onion skins at once, use Alt + B ; some tutorials also mention Ctrl + H for hiding the UI, not onion skin itself.

Quick steps

  1. Select your rig or object.
  2. Press B to turn onion skin off.
  3. If multiple onion skins are showing, press Alt + B to clear them all.

Extra note

In Moon Animator tutorials, B is the main shortcut for onion skin on/off, and recent guides still show that same workflow.