Onyx Boox Poke5P User Manual page 45

Format
Fonts: You can import your own
fonts to use. Save your fonts to
Storage/fonts. When you open a
document, the fonts will be
detected. The settings such as font size, typeface, contrast,
bold, spacing only work on the newly opened documents
but do not work on the documents opened before the
.
settings
If you want to restore the original format of the document,
you can tap the Restore Original Format icon.