Hello everyone,
it's my first message on this forum.
I'm using Calibre on my Win10 laptop to manage my off-line ebooks and eComics (majority of my collection) & convert them, if needed.
Until last week, I read my collection on a Kindle, but now I have PocketBook Color so I can finally enjoy my comics in colour.
I saw that it supports .cbr & .cbz, and I know that Calibre can identify - and even properly display - eComics in said formats.
My problem is - there is no output option for .cbr & .cbz in Calibre. Neither native nor in form of a plug-in. 
As I can't program, I hope to find help here.
In the meantime, I'll be stuck with PDFs or the kinda tedious process of "unzip - push JPGs single-file into LibreOffice - convert LibreOffice file into PDF - pull PDF into running session of Calibre (it auto-copies the file, I discovered a few years back) - add metadata - send to device" .
https://www2.mobileread.com/i/smiliesadd1/y_whew.gif
If you know a solution, please reply.
Greetings from Germany,
Geneon