lightdm-gtk-greeter-settings from home:mauriziogalli:branches:X11:Utilities project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mauriziogalli:branches:X11:Utilities/openSUSE_Tumbleweed/home:mauriziogalli:branches:X11:Utilities.repo zypper refresh zypper install lightdm-gtk-greeter-settings