This is a sample page from the cueing
score for Bach's St. Matthew Passion.

The page shown here is Bärenreiter
Piano Vocal Score, Page 268.

Each cue is numbered and labeled with
the first few words of the text on that slide.

Note that the last cue on this page is #512, and the work is not over yet. The St. Matthew Passion contains 561 PowerPoint slides!!

Click on the page image to enlarge it