for all...thanks guys ... it's nice to see that you care about solving the problems I have posed to you
and anyway, I still think that it would be enough to restore the part that has been modified in the latest version of Calibre regarding the management of fonts and everything would be solved. I don't understand why you need to change something that works perfectly. And I don't think I'm the only person who has noticed these negative changes even though I'm the only one who wrote it down.