To retarget from one character to another
, then select Source > character, where character is the name of your source character. (All HIK characters available in the scene are automatically listed in the Source menu.)
The target character snaps to match the position of the source character, and the retargeted animation is automatically added to a new animation layer called RetargetLayer.
, then select Control Rig > Add to new animLayer.
This set up lets you easily modify the retargeted animation non-destructively using animation layers.