Quote:
Originally Posted by nepentanova
I have an ebook that is >100mb. Is it possible to reduce the file size of this book in calbre by reducing the quality of the images?
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Don't use 'Tablet' or something with a big screen), as the output profile.
If you use Kindle (the earlier e-ink versions), the images are under 800x600.
Also, don't embed any non-specialized font. sub-set others.

Unpack the book (Tap 'U'), use explore (details) t0 see where the big stuff is, then make your plan. (just cancel the Unpack)
As always: SAVE A COPY OF THE BOOK before things go south