As in title - is it possible to use Compiz with GNOME Flashback on Ubuntu 20.04 ? If yes, how ? It would be nice to have some features like window overview screen with miniatures of all open windows, something that Compiz provided in the older version of Ubuntu.
compiz-gnome package is in place.
So it should work after you install it with
sudo apt-get install compiz-gnome
and optionally set settings using CompizConfig Settings Manager (
sudo apt-get install compizconfig-settings-manager
Then select relevant session on login screen.