I highly recommend looking at the GtJ.
Guide to Judging: Judging Engineering Notebooks – REC Library It details in depth about criteria for the notebook, and what judges look for.
Also keep in mind of the rubric while you document your team’s journey throughout the EDP. It lists what you actually need.
Judging Resource: Engineering Notebook Rubric – REC Library
Other tips are to document regularly; go in depth about how you developed your robot, and why. Do a game overview, tournament reflection, etc. I haven’t judged, but I have heard from others and read about this topic. Judges want to read about your thought process; they don’t want to just see a picture of a robot.
You especially want to include aspects such as your code and CAD models if possible. A lot of teams (especially IQ) don’t code or notebook too much about it; doing so will give you an advantage I believe.
You can find good examples of notebooks on the forum:
515R - Worlds Design Award
There are also multiple posts on this topic:
If you have any more questions, LMK.