If when you start up your PC you don't see any boot menu at all, you'll need to first learn how to make your GRUB menu appear.

When Ubuntu changed to Grub 2 a couple of releases ago, it became significantly more difficult to set up multi-boot Linux systems. Most if not all Ubuntu derivatives are also using Grub2, and now the ...

If you do want to take the Archinstall route, you'll find that the new update adds a new screen to the process that lets you ...