Selecting and arranging layers

Jeff Almasol provides a versatile script on his website that creates a panel with controls for moving various combinations of items in time— layer In point, layer Out point, layer source frames, keyframes, and markers: www.adobe.com/go/learn_ae_jeffscooter.

Select layers
Change the stacking order for selected layers
Coordinate systems: composition space and layer space
Move layers in space
Separate dimensions of Position to animate components individually
Align or distribute layers in 2D space
Trim, extend, or slip-edit a layer
Remove part of the duration of a layer
Place a layer in time
Arrange layers in time sequentially
Copy or duplicate a layer
Split a layer
Auto-Orientation options