Originally Posted by RedRoverJ
I use Calibre exclusively for organizing my eBook library. It is nothing to convert within Calibre to correct margins, spacing, etc. However, for someone who does not normally use Calibre it would seem more work.
I tried to use Calibre to adjust the margins in a book I'm reading. After conversion I saw absolutely no difference in the margin. However the book went from taking almost 2 minutes to load down to about 10 seconds. I'm not sure why this happened.