Turns constraints off or on in an animation.
Tgl – The constraints’ states are toggled. That is, if a constraint is ON, then it becomes OFF, and OFF become ON.
Tgl Unify – If the specified constraints are either all on or all off, then this behaves the same as Tgl. If some of the specified constraints are on and others are off, then the first use of Tgl Unify will set then all to the same state, and subsequent uses will behave the same as Tgl.
None – Changes states for constraints only on the specified objects. For example, if the object’s option is set to Active, only those constraints applied on the active objects will be changed.
Above – Changes states for all constraints on the specified objects and the objects above them in the hierarchy.
Below – Changes states for all constraints on the specified objects and the objects below them in the hierarchy.
Constrained – For any used object, if it is constrained by any other objects, all the constraints are changed.
Constraining – For any used object, if it is constraining any other objects, all the constraints are changed.
Both – Any constraints, no matter if constrained by an object or constraining to an object, will be changed.
The following is an example to illustrate the Side of settings:
Where both obj_3 and obj_4 are constrained by obj_2 ad obj_2 is constrained by obj_1: