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Merge Geografts: Merge grafted items, typically pieces of anatomy, with the active mesh.
Merge Meshes: Merge selected meshes to active mesh.
Merge UV Layers: Merge active UV layer with the specified layer.
Make UDIM Materials: Combine materials of the selected mesh into a single UDIM material.
Convert To Widgets: Convert the active mesh to custom shapes for its parent armature.
Finalize Meshes: Remove some build-time data structure from active mesh to improve viewport performance.
Finalize Armature: Remove some build-time data structure from active armature to improve viewport performance.
Make All Bones Posable: Add an extra layer to driven bones, thus making them freely posable.
Optimize Pose For IK: Put the character in a pose which is a suitable rest pose for IK rigs (knees and elbows slightly bent in the main bending direction).
Apply Rest Pose: Apply the current pose as the rest pose.
Connect IK Chains: Connect bones to the parents and unlock the last bone in the chain. To make it possible to use Auto IK.