Edit Deformers >
Blend Shape > Swap > 
- Specify Node
-
If the
base object shape you selected is influenced by only one blend shape
deformer, you don’t need to set Specify Node on.
If on, you can specify BlendShape Node and Existing Nodes.
Default is off.
- BlendShape Node
-
Specifies
the name of the blend shape deformer whose target object shapes
you want to swap. Only available if Specify Node is
on.
- Existing Nodes
-
Lists
all the blend shape deformer nodes in the scene, and indicates the
blend shape deformer whose target object shapes you want to swap. Only
available if Specify Node is on.
