When I see a piece of music on my stand, the pencil markings of the previous performer can really tell me a lot. About that performer, usually. Frequently I see notes about which fingering to use for F or Eb. In a tricky passage, this is often very helpful. Sometimes EVERY F and Eb in the entire part is marked - this is just silly. Often the dynamic markings have been changed or circled. Neither is particularly meaningful, as the previous performer was most likely not playing on this exact stage for this exact conductor, with the same colleagues, and was probably not me. Therefore, what his conductor told them about the precise level of their solo is not relevant right now. I have seen parts where the previous performer did such a careful and tidy job of changing the dynamics and articulations that her marks were indistinguishable from the composer’s, which led to a lot of frustrated apologizing in rehearsal when I thought my part was correct an...