Rebuild - At a different time than when you take your notes (maybe later that night), rewrite them as a summary.

As a general guide, highlighted content should be roughly 10% of the main content. This is a great place t use tags in OneNote, especially on Windows where tags are searchable. 'Highlighting' can be literal, like with a highlighter, or it can be copying these key concepts into a separate part of the page with visual links (spacing, lines, etc.) to the section. Review - after you are done taking your notes, red them through and find a way to highlight key ideas, main points, etc. The Cornell Notes system is a good way to address this, but there are others. Most importantly, notes work best when they are part of a system of record->review->rebuild. Now you can take notes directly on top of the document.

Right-click on the images, then click on 'Set image as background'. If you receive documents ahead of time (lecture notes, PowerPoint decks, etc.), paste them into a tab for that day's notes.

How to use onenote for note taking