The BIOS/UEFI or boot menu can be accessed by holding specific keys down during boot. Refer to the table below for the keys on each model:

Model	BIOS/UEFI key	Boot Menu key
Laptops: All Open Firmware models Pangolin (pang12 and above)	ESC	ESC: Select One Time Boot (Open Firmware) or Save & Exit → Boot Override.
Laptops: Most proprietary firmware models	F2	F7
Older laptops	Depends on the system	F1
Thelio desktops	Del/F2	F8/F11/F12
Meerkat (mini) desktops	F2	F10

If the listed keys don't work, try holding each F1 through F12 key during separate reboots until the BIOS/UEFI appears.

Open Firmware Screenshots

The following screenshots show the menus in System76 Open Firmware with Coreboot:

Main Menu

Displays the computer model, firmware version, and available options.

One Time Boot

Allows booting to a non-default boot device.

Change Boot Order

Allows changing the order for selecting the default boot device.

Firmware Configuration Information

Displays information about the firmware's build-time configuration.