Select Window
> Relationship Editors > Character Sets, or if
you already have the Relationship Editor open, select
its Character Editing mode option.
Select
a character set so that it is highlighted.
Click
the + icon next to the selected character set to list all the attributes in
the character set.
Select
the attributes you want to remove from the character set so that they
are highlighted in yellow. Remember that you can select items next to
each other by -clicking,
and that you can select items not next to each other by -clicking.
In
the Relationship Editor, select Edit
> Remove Highlighted Attributes.
If
you’d like to return to the workspace and pose or animate the character, with
the character set still selected, select Edit > Select Character
Set.
To
add attributes to the character set
Select Window
> Relationship Editors > Character Sets, or if
you already have the Relationship Editor open, select
its Character Editing mode option.
In
the left column (Character Sets), select the
character set to which you want to add attributes so that it is
highlighted.
In
the right column (Objects), select the object
whose attributes you want to add to the character set.
Expand
the object so that its attributes are listed (click the + icons
next to the object’s name).
Click
on the names of the attributes you want to add to the character
set.
If
you’d like to return to the workspace and pose or animate the character, with
the character set still selected, select Edit > Select Character
Set.
-clicking,
and that you can select items not next to each other by 
-clicking.