Onyx Poke5 BOOX User Manual page 39

Black and white models cannot distinguish colors, but the colorful
highlights and underlines can display their original colors when
exported to other devices.
Some darker colors may cover text completely. Please select
suitable colors for highlights.
Progress
Here it shows a chapter name of the current document (if no chapter
name, the document name will be shown), progressing page number,
Previous/Next chapter, page number, Automatic Page-turns, Redo
and Undo, etc.
Tap the page number to pop out the
Jump-to-page dialog box. Enter the
page number that you want so as to
jump to the relevant page.