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 like Ubuntu, Linux Mint, elementary OS etc. 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
