Her notes are so clear and so artfully wrought! I wonder if learning from online resources makes one naturally focus more on presentation.

From the article:

https://www.quantamagazine.org/wp-content/uploads/2025/08/Ha...

I studied math and knew a girl like that, spending an inordinate amount of times making sure to understand every single details of what we were taught, even going further when I could barely keep up. She would also make those pretty, colorful notes with visual interpretations and drawings in the margin. It takes a special form of love for the discipline. She just finished her PhD and is now starting a postdoctoral contract.

Looks like a prepared presentation rather than notes.