Main toolbar > Open Track View > Modify Subtree
Graph Editors menu > Track View > Open Track View > Modify Subtree
Modify Subtree has three modes: Edit Keys, Edit Time, and Edit Ranges. Modify Subtree allows edits in a parent object to affect the children of that object.
Procedure
To drag the ranges and linked descendants of an object:
Click Edit Ranges.
Click Modify Subtree.
Drag an Object range bar or the World range bar.
With Modify Subtree on, a range bar is displayed in the Objects branch. The Objects branch is the default parent of all named objects in the scene.
Dragging a parent Object range bar, with Modify Subtree on, affects all tracks subordinate to the object and all tracks of its linked descendants.
Dragging the World range bar, with Modify Subtree on, affects all tracks in the scene, including Sounds, Materials, and all tracks of all objects.
Interface
Modify Subtree (Edit Keys): Edits (cuts, pastes, or moves) keys in the parent track. Anything you do to the keys in the parental track affects the child keys as well.
Note: Adding keys only affects the current track.
Modify Subtree (Edit Time): Edits time keys in the parent track. Cutting and pasting a parent track, cuts and pastes the child keys as well.
Modify Subtree (Edit Range): Affects the tracks of an object and all of its descendent objects. When you edit the range of a parent object, the child objects are also affected.
When you switch from one display mode to another (such as from Edit Keys to Edit Time), the Modify Subtree button is automatically turned off.
When Modify Subtree is active, Slide Keys is inactive.