Want to see GRUB screen menu on Librem Mini

[amarok]

Does this help?

Pureboot - How do I see the OS Boot Menus?

If you use just plain coreboot, then press the esc key after the purism logo disappears. Like said above, there is a short window of time. If using pureboot. then: Start your Librem — on the PurBoot menu select “Options” → “Boot options” → “USB Boot” → press ENTER on the first entry What should take you to the tails initial menu.