Editing rigid skin point set membership
You can directly edit rigid skin point set membership with the Edit Membership Tool. For a more intuitive approach, you can also paint rigid skin point set memberships with the Paint Set Membership Tool (see Painting rigid skin point set membership). Note that you can also edit rigid skin point set memberships from the Relationship Editor ( Window > Relationship Editors > Deformer Sets), but this approach is less intuitive than using the Edit Membership Tool or the Paint Set Membership Tool.