Slot Mates You can specify a default constraint type and lock the rotation for slot mates. To select a default constraint type, click Options > Document Properties > Mates and under Slot mates, select an option for Default constraint. To lock rotation for a slot mate: Under the Mates folder, right-click the slot mate and click Lock Rotation. Right-click the Mates folder and click Lock Rotation. In the Mates PropertyManager for slot mates, select Lock Rotation. Parent topicAssemblies