[JSWolf]

Originally Posted by DNSB

Using a Kindle Paperwhite 10th Gen with firmware 5.16.6. I added the following CSS to the ePub file's stylesheet using Sigil before converting them to azw3 in calibre 7.5.1 (note that I wrapped the extra CSS in a media query).

@media amzn-kf8 {
  html {
    margin-left: -50px;
    margin-right: -50px;
    break-inside: avoid !important;
  }
}

I did this with 3 books (Sigil User's Guide, calibre User's Guide and Fated Blades by Ilona Andrews). I opened all of them on the Paperwhite, paged around, switched to some other ebooks and back. So far nothing other than the narrower margins on those 3 were seen.

This CSS code fails on a PW5. If you remove the @media part, it works no problem. I do use -45px instead of -50px.