Settings
Reading
Typeface
OpenDyslexic and Atkinson Hyperlegible are free for everyone, always.
Fixation point
Anchor
Controls
Control
Reading mode
Page text size
Theme
Ground
Sepia and Night are part of Fovea Pro. Choosing one keeps it, and it applies as soon as Pro does.
Language
Interface language
The catalog keeps its own language, chosen per book.