Customize fonts on e-readers
You can customize reading fonts on most modern e-readers. On some models you can even customize the system fonts.
Kindle
How to Install Custom Fonts on Your KindleKobo
Load fonts onto your Kobo eReaderOnyx Boox
For Onyx Boox devices, you can download .ttf or .otf font files and put them in the fonts folder in the root directory. You will be able to change the reading fonts in NeoReader.
On newer Boox devices (like Tab Mini C), you can change system fonts by going to Settings -> Display -> Text (Font, Text Size). As of October 2023, you can only choose from Roboto Medium, Roboto Bold, or Roboto. You need to re-start the device to make the change effective.