How to change the login screen background in Manjaro XFCE
This tutorial will show you step by step how to change the login screen background (also called wallpaper) in Manjaro Linux with the XFCE desktop environment.
The steps on this page will probably also work for other Linux distributions with the XFCE desktop environment, like Arch, Debian, Linux Mint, Xubuntu, Fedora, MX Linux, and other distros.
You can change the login screen background with an image (wallpaper) you've downloaded somewhere.
1. Open a terminal window.
2. Type the following line:
Thunar is the name of the file manager.
3. Press the Enter key on your keyboard.
4. Type your password.
5. Press Enter again.
The file manager will now open with root privileges.
6. Copy your wallpaper into the following folder: File System/usr/share/backgrounds.
7. You can now close the file manager.
8. Click on the start menu button.
9. Click on Settings.
10. Click on LightDM GTK+ Greeter settings.
An authentication window will appear.
11. Type your password.
12. Press Enter.
A “LightDM GTK+ Greeter settings” window will appear.
13. Click on the button next to Image.
Another window will appear.
14. Go to the following location: File System/usr/share/backgrounds.
15. Select the image you want to use as your new background for the login screen.
16. Click on Open in the top right corner of the window.
17. Click on Save in the bottom right corner of the “LightDM GTK+ Greeter settings” window.
That's it. If you now log out or restart, you will see the new background on the login screen.