I usually go to the right top corner and at the drop down menu I select the tool icon to go to the settings.
However, 19.10 does not have a tool icon.
How can I go to settings now?
Thanks for your hints.
This helped:
sudo apt install gnome-control-center
Strange, that it wasn't installed during upgrade?
gnome-control-center
or ALT+F2 then type it – cmak.fr Nov 16 '19 at 06:06apt policy gnome-control-center
– pomsky Nov 16 '19 at 06:12