Hexagonal Paper Template
Having a hexagonal would make chemistry note taking so much easier. Especially in higher level chemistry since there are so many different compounds you have to learn.
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Ariel commented
You can add your own templates, if you have a PDF or image you like:
https://support.goodnotes.com/hc/en-us/articles/360000115295-Adding-custom-templates-to-the-template-library(You probably have a source of hex paper; if not, you can find some at https://incompetech.com/graphpaper/hexagonal/)
You can adjust the Zoom window return height, if you like the Zoom tool:
https://support.goodnotes.com/hc/en-us/articles/201565249-Adjusting-Zoom-window-return-height-for-a-template
What is not spelled out in that article is how much a "point" is. When importing a PDF as a template, one inch = 132 points. (This is presumably because the iPad 2 had a screen resolution of 132 pixels/inch.)