Contrast
Embolden: only embolden text
in PDF
Sharpen Img: Make blur image
sharper
Watermark Bleaching: Bleach
the light-color images or background on the page
Dark Color Enhancement: Adjust for the whole page or only the text,
making the display darker;
Picture dithering: Optimize the display effect of pictures with
gradient colors;
Navigation
This section includes Comic Mode, Article Mode, Reflow, and more
custom settings. You can crop a scanned PDF, divide it into columns,
and set its browsing orders.
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