Yes, dense material you absorb during a lecture does typically require a lot of writing. IDK about you but I found writing down at least all the formulae and gr

Yes, dense material you absorb during a lecture does typically require a lot of writing. IDK about you but I found writing down at least all the formulae and graphs tremendously helpful for absorbing the material. If you write detailed notes, they become far more than bookmarks, you can then refer to notes primarily, and to the textbook for the stuff that's not clear from the notes.