The second most important thing to watch for is match action. This is where you make notes of how the actor walked, stood, used a prop, exited/entered, and other ways they moved their body. I suggest getting a short hand of symbols you can write in your notes/sides for this. I use a multi colored pen for this exact reason.
Whenever an actor stands, I’ll make an arrow pointing up. If an actor turns, I’ll make a circular arrow going either clockwise or counter clockwise. If they exit, I’ll write down “XOCR” for crossed out camera right. These are all symbols and abbreviations that I have in my legend, which I have in my shared Google Drive folder that the editors can access any time.
Feel free to use my shorthand (attached as a downloadable PDF) to get you started. You’ll also probably start making up your own shorthand/symbols too, which I encourage you to do. Add them to the legend, and send your editor a copy.
My multicolored pens are also vital to making sense of these symbols. I dedicate specific colors to certain takes. For example:
BLUE: take one
GREEN: take two
RED: take three
PINK: take four
LIGHT BLUE: take five
PURPLE: take six
LIGHT GREEN: take seven
BLACK: take eight and beyond
After a few takes of the same action, I start to circle my match action notes with the correct take color instead of writing them again and again. It’s faster, and keeps you available to watch for other moments that are different than the last.