Numderline is a hacky font patcher that takes a font and converts it into one that underlines alternating groups of 3 digits starting from the right. It can also do other similar tricks.
It was inspired by my job involving a lot of staring at numbers in nanoseconds and trying to pick out the milliseconds or microseconds.
A blog post about this and a web page to see and download pre-patched fonts should hopefully be coming soon™.
- Patch any font to underline alternating groups of 3 digits in numbers
- For use in proportional contexts, can also just insert fake commas with shaping
- Alternatively it can squish digits and group them closer together in threes
- Or some other variants, including small monospace mini-commas!
- Clone the repo
- Install the FontForge Python API, on macOS I used Homebrew to do this with
brew install fontforge, or you can use
- Install the fonttools API, I used
pip3 install fonttoolsto install it in my Homebrew python3, or you can use
pip3 install -r requirements.txt
python3 patcher.py FONT_FILE_TO_PATCHand look in the
You can also run
python3 patcher.py --help and read the source to see other options.