Edit menu

Undo: Reverses the last action. Mudbox stores an unlimited undo queue without consuming memory (RAM).

Note
The Undo history is not saved when switching between subdivision levels.
Redo: Reverses the last Undo.
Delete Selected: Deletes the selected item, removing it from the scene.
Select All: Selects all objects in the scene.
Invert Selection: Selects all objects not currently selected and deselects all selected objects.
Deselect All: Clears the current selection so that nothing is selected.
Grow Selection: Expands the selection of faces across the surface.
Select Border: Selects the border edges of an open mesh.
Lock Selected: Locks selected meshes. Locked meshes cannot be edited with the sculpting tools.
Invert Locked: Locks all unlocked meshes and unlocks all locked meshes.
Unlock All: Unlocks all locked meshes.
Freeze Selected: Freezes the vertices of all selected faces. Frozen vertices cannot be edited with the sculpting tools. Freeze maps can be painted with the Freeze brush.
Invert Freeze: Freezes any vertices not frozen and unfreezes all frozen vertices.
Unfreeze All: Unfreezes all frozen vertices.
Edit Stencil: Opens the Edit this stencil window. See Edit a stencil.