You're welcome. Just to make it absolutely clear I looked around to see what the 'performance mode' is exactly and it is a compromise
that comes at a price.
Quote:
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Originally Posted by http://www.onyx-international.com
BOOX Android-based eReader will be implemented into a new refresh mode called A2 mode. This mode is purposely set for text-based books. It can speed up the pageturn and refresh of Eink screen. Refresh speed of this type of mode is 2-3 times faster than the regular refresh mode. A2 mode can improve the pageturn speed significantly while it does not have much side effect on screen display.
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This mode reduces the palette to 1-bit, i.e. two colours - black and white (down from 16 shades of grey). The effect of that is that fonts essentially lose anti-aliasing, which means they get sawtooth, jagged edges. The smaller the font, the more severe the perceived degradation of quality. PDFs that use embedded fonts are less affected, PDFs that contain scanned documents more, since the shades in the fonts are not uniform.
I find A2 good enough for the books I got from bookshops, with scanned books the results vary. It's a nice addition for skimming through books. Comic book readers will likely avoid this mode.
I will take some pictures to show differences in quality, something you couldn't see in the video.
These
two sources give more specifics about what A2 is.