2009

Link to World Links the object to the world (the scene as a whole). We
recommend this be the first target in the list. This prevents the object from
reverting to its independent creation or animation transforms if other targets
are deleted from the list.
Delete Link Removes a link target. Once a link target is removed, it will no
longer influence the constrained object.
Start Time The start time spinner is used to assign or edit the frame value of
a target. Select one of the target object names in the list window and see the
frame where the object becomes a parent. You can adjust the value to change
when the link transfer takes place.
Key Mode group
NOTE The options Key Nodes and Key Entire Hierarchy have no effect unless the
object you are constraining is already part of a hierarchy. If you add objects to the
hierarchy after you apply the Link constraint, you have to reapply the Link constraint
using the key options you desire.
No Key When used, no keyframes are written to the constrained object or its
targets. The link control happens without inserting any keys.
Key Nodes When used, keyframes are written to the specified option. There
are two options: Child and Parents. Child sets a keyframe only on the
constrained object. Parents sets keyframes for the constrained object and all
of its targets.
Key Entire Hierarchy Sets keyframes up the hierarchy for the specified option.
There are two options: Child and Parents. Child sets a keyframe only on the
constrained object and its parents. Parents sets keyframes for the constrained
object, its targets, and their upper hierarchy.
LookAt Constraint
Animation menu > Constraints > LookAt Constraint
3312 | Chapter 15 Animation