GDM Settings
Settings app for GNOME's Login Manager, GDM
Change GDM Settings; Apply theme and background, change cursor theme, icon theme and night light settings, among other things.
Configure GDM settings using a graphical interface.
How to install GDM Settings in Ubuntu
If you are on a supported distro, you can install the application through software center by clicking the below link.
If the above link not working, run the below command in terminal to install gdm-settings in Ubuntu
sudo apt install gdm-settings
GDM Settings Screenshots
