You can change the number of joints or influence objects that can influence a skin object’s points. In general, you set the initial Max influences value in the Smooth Bind Options when you bind skin.

To edit maximum influences

1. Select the skin object(s) whose maximum influences you want to edit.
2. Select Skin > Edit Smooth Skin > Set Max Influences.
3. In the Set Max Influences window, set Max Influences.
4. Click Apply to set the new value.