Using the pointer, select the points
whose rigid skin point set membership you want to change.
To add points to the currently selected
set, -click
the points you want to add.
To remove points from the currently selected
set, -click
the points.
To add points to some other rigid skin
point set, first select the rigid skin point set’s joint. The points
currently in the set are displayed in yellow. Now, as before, select
the points you want to add by -clicking
them.