1. Text instructions that float with a part. For example: "Straight mute" or "Pull mute". Even "Half-valve" for a trumpet on a riff.
2. There is a difference between a slur and a pitch bend on a horn from a start point to an end. Can use the trill symbol going from start note to end note. Trill can also be a shake.
3. Chords for just a part, not the whole score. For example, a solo section where you want to provide the chords as they change so that the soloist can improvise off of the chords for that section. Currently the chords go on top of the whole score. This is also true in piano and guitar where perhaps the majority of the song just provides chords but specific riffs are written out.