Adding Actors to a Library Palette Entry
When you save Poses and Faces to the library, a Select Subset button appears in the New Set dialog, allowing you to specify which actors to include in the library file. This allows you to create poses that affect only a part of the figure (for example, a pose that only affects the arms and hands, rather than the entire body of a figure).
If you opt to select a subset of actors within your scene for saving to the Library palette, the Hierarchy Selection dialog appears, allowing you to specify the actors you wish to include in your new Library palette entry.

You can include or exclude specific body parts from saved poses.
The list of actors appears hierarchically, just as it does in the Hierarchy Editor window (see The Hierarchy Editor). You can expand collapsed hierarchies by clicking the right arrow next to a collapsed branch, and can collapse expanded branches by clicking the down arrow next to an expanded branch. The right and down arrows in the upper right section of the Select Objects dialog will expand or collapse the entire hierarchy tree.
To include an actor in your new Library palette entry, check the box to the left of your desired actor. Clearing an actor’s checkbox excludes it from the Library palette entry. Excluding an actor that is a parent of one or more actors excludes the children actors as well.