I love Xiao, 3 pretty grub, 2 versions ૮ ˶ᵔ ᵕ ᵔ˶ ა

- Using Xiao Grub as an example:
- cd to where you copied it, on your terminal, in my case (tested on Debian, Arch and EndeavourOS):
sudo cp -r Xiao /boot/grub/themes

- Then edit the name of the grub theme you want:
sudo nano /etc/default/grub

GRUB_THEME="/boot/grub/themes/Xiao/theme.txt"

Update the grub
sudo grub-mkconfig -o /boot/grub/grub.cfg

- Reboot your pc