Progress bar markers
You can now mark points on a progress bar: where you started reading this session, or where you opened the book. Each bar can show a marker above and/or below it, as a chevron or a solid triangle, with adjustable size, position and colour. Set them up per line under Bar style > Markers, or on full-width bars in the bar's own settings.
Line progress bars also gain the tick-height and tick-width controls that full-width bars already had.