Adding themes
We’ve only looked at altering the content of the boot menu, but Grub also lets you change its appearance. You can set a graphical background by setting to the full path to a PNG or JPEG file, or you can theme everything on the display.
Themes are contained in directories in and you select one by setting to the name of a theme directory (not the full path) in The default theme is Starfield, although this is packaged separately in some distros so you may need to install it. Themes are installed to Copy any you want to
set accordingly and reboot. If you do want to experiment, start with an existing one and modify it. The Grub info page documents the components.
use to