Select sprites with one and the same castmember –
selects all sprites that have the same castmember as of the selected
sprite/s, regardless of the sprite transformations in the Score.

If you hold the Ctrl key down and click the Select Sprite icon in
ScoreCommander/Sprites/Select Sprite, all of the sprites, identical to
the selected ones, will be selected. “Identical” means that the
Score transformations (rotate, skew, etc.) of the selected sprites
are considered.

By this command, you can select sprites that are included in spans, containing sequences of castmembers.