Periodic PSA!
I use lots of graph paper, so I made a LaTeX template to print my own. It was so handy that @duetosymmetry and I turned it into a LaTeX package.
There are various grid styles (graph, quadrille, hex, iso, dot grid, etc), and both custom and pre-defined color schemes.
Use it to easily print your own paper, or to make pdf page templates for your favorite tablet note-taking app. I use them with GoodNotes & Notability.
Github: https://github.com/mcnees/LaTeX-Graph-Paper
CTAN: https://ctan.org/pkg/gridpapers?lang=en
@mcnees My favourite grid spacing is dots on a rectangular grid with ratio of 1.86:1. This results in a grid that is easy to draw squares, triangles, and hexagons on which all look more or less regular. The density of dots work well as lines for writing too. It’s the best of all worlds IMO, or at least the least bad.
@dx Hmm, I’ll have to look at adding that!