Multi Operating Systems¶

Easiest way is to use separate disks (this limits cases of over-writing important data)

Second is to check that your hardware supports Other OS secure boot options if planning to use with Windows 11.

Then simply: follow this section of the wiki

Make sure you have os-prober package installed

This can also be achieved through custom entries using blkid in /etc/grub.d/40_custom

Other bootloaders have their own ways of doing this.

For same disks, you might be using another app to format, resize, etc before-hand.

Then you can use Manual Partitioning, anything left marked as Existing will not be formated.

Already have a bootloader: --skip-boot will allow you to skip BL selection in the menu and None will do the same.