Boox TabX - Reflow

Crop: You can manually crop the
blank margin in either single-page
or dual-page modes.
Columns: Divide the current doc
into different columns
Direction: Set the reading order of
the divided columns
Reflow
Only apply to PDF\DJVU\CBR\CBZ in
scanned version and text-based
version.
Reflow scanned documents
You can adjust Text Direction,
Spacing, Alignment, Font Size,