Originally Posted by janvanmaar
Where can I find the tweak you mention?
It was just an idea for a possible implementation - you would have to code it yourself. Trivial to do though - code like this will allow you to grab a value from the tweaks set on your machine (from a patch I did today to allow disabling bookmarks):
from calibre.utils.config import tweaks
self.disable_bookmarks = tweaks['disable_bookmarks_in_ebook_viewer']
If you want to put it all together as a patch to submit then you would also want to modify resources\default_tweaks.py so that other users would know what the possible values are.
Thanks Kovid for the latest fix for zip interface actions, will change the two I have written so far to use that approach.