Thank you for your response
Your information was enlightening as to the new state of things with the Kindle Scribe.
Thanks to your information, I was able to get book covers uploaded to the Scribe.
This is my procedure
1. Download KFX Output plugin
1a. Update KFX Output plugin to create azw8 (here: Post #90
https://www.mobileread.com/forums/sh...=272407&page=6 - the plugin has updated in the meantime but most of it is still applicable)
1b. go into "C:\Users\[username]\AppData\Roaming\calibre\mtp_devices.json" (open with Notepad) and add "azw8" to "format map" beneath "azw3"
2. Convert books to azw8 (or KFX), selecting "Create personal document instead of book" option in KFX Output menu in options on left side of window
3. Connect Kindle Scribe to pc
4. Send to Device (checking that azw8 or kfx are selected)
5. enjoy thumbnails in calibre-uploaded books
Thanks again.
Edit: Converting from AZW3 to KFX (or AZW8) results in custom fonts not being retained in KFX. Best to convert AZW3 to EPUB or MOBI first, then convert to KFX to get your own fonts in the book.
Also, I can't remember if it's been said, but the KFX books take a beat or two to show up in the Library list, and usually the book files don't have to be indexed to be viewed in the Library. they will appear in list view almost immediately.