Quote:
Originally Posted by theducks
In the book editor (AZw3 or EPUB), Open the image file. there will be basic image tools on the section toolbar
 You can also open the image from the code usage by right clicking.
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Thanks. Didn't know that was possible.
But I just tested, and it looks like it's only manual. You have to manually drag a box and tell Calibre to trim.
Having to do that for every fleuron?
Imagemagick's -trim is automated.
Complete Side Note: I was just looking in
The Expanse books... and they have a 91x69px fleuron of a little lightning bolt... 80.7 KB JPG... I was able to convert to 1.2 KB PNG... talk about unoptimized!

It's ~6% of the total size of the book!