Choose one of two sets of costumes: each set is in a separate cast. Switching the cast assigned to sprite on the Stage changes which costume parts appear. The selected mask and costume are recorded in global variables.
Click Set One or Set Two to select the cast assigned to the sprites.
Click a costume or mask to select it. Fields below the variable names on the right display the cast member name for the selected mask, costume, and cast.
To see the Lingo that does this, see script cast member 12 in the Scripts cast.