This bug was fixed in the package gnome-user-docs -
3.38.2+git20210212-0ubuntu1
---
gnome-user-docs (3.38.2+git20210212-0ubuntu1) hirsute; urgency=medium
* New upstream git (LP: #1904277, LP: #1915256)
-- Gunnar Hjalmarsson Mon, 15 Feb 2021 00:57:00
+0100
** Changed in:
Thanks for your report! You are indeed right, you can't change the
background separately any longer in Ubuntu 20.10.
The upstream docs has been corrected to reflect this:
https://gitlab.gnome.org/GNOME/gnome-user-docs/-/commit/296ff6db
and that correction will be included in Ubuntu 21.04.
**
