Kodi Community Forum

I just read the http://wiki.xbmc.org/index.php?title=Adv..._filtering and I could not find a way to make a NOT filter

For example: I want to show all movies without "ABC" TAG (NOT ABC)

Is it possible?
Thanks

UPDATE: When filters get cleared? Is it supposed to be cleared when I leave the library? I think they should be fixed after restarts/reboots/etc.

The filter option is like an on-the-fly smart playlist (wiki), so it only contains a few common options. To filter things out then you'll probably need to make a smart playlist (wiki).