Install sabily-gdm-themes by entering the following commands in the terminal:
sudo apt update sudo apt install sabily-gdm-themes
Description:
Sabily GDM themes
The default GDM themes for Sabily. At the moment the package contains: * HumanME * Sabily-green * Shahada
Homepage: http://www.sabily.org
Version: 1.4
Section: universe/x11