Music theory :/

what do the following mean in the highlighted score:

  1. System dividers. When using a score that is hiding staves that aren’t being used, and multiple systems are on a page, system dividers are customary.
  2. A rehearsal mark to denote major sections of the work and obviously assist with rehearsals.
  3. Indicates that section will be conducted and felt in 3 larger beats, even though the time signature is 9/4.
2 Likes

Thankyou.

1 Like