Recently fresh/clean installed from 16.04 (to 20.04), where I was able to use the document scanner app to drive my Brother document scanner.
I'm trying to use the (Gnome) Document Scanner app on 20.04 and it's saying "No scanners detected".
This is likely because my scanner is on a different sub-network, but I can't find an option in "Preferences" to manually specify the IP address of the scanner.