Reference > Keyboard shortcuts >
Edit menu

Action | Windows and Linux | Mac OS X | Results
--- | --- | --- | ---
Undo | Ctrl + Z | Command + Z | Undoes your last action.
Redo | Shift + Z | Shift + Z | Reverses the last Undo operation.
Delete | Delete | Delete | Deletes the active model.
Lock Mesh | Shift + F | Shift + F | Locks the active model.
Unlock Mesh | Ctrl + Shift + F | Ctrl + Shift + F | Unlocks all locked models.
Freeze Selected | Shift + M | Shift + M | Freezes the vertices on all selected models.
Invert Freeze | Shift + I | Shift + I | Freezes any vertices not frozen and unfreezes all frozen vertices.
Unfreeze All | Shift + U | Shift + U | Unfreezes all frozen vertices.