I recently got to use a GLKVM device to remote control a SFF computer that runs as a server. It features a normal mainboard with an AMI-BIOS. The default of the splash screen of the AMI-BIOS was 1 second.

After trying a couple times to enter the BIOS for WOL and other settings, I failed trying Esc, F1, F2, Del, F10, F11. None of them worked. Supposedly because the time to input was so short and the delay of the remote console just made finding the right moment even more difficult.

The solution I had not heard of before: Keep the right button pressed throughout the whole boot process until you entered the BIOS setup.

And that worked. I kept pressing F2 throughout the whole boot process and suddenly entered the BIOS setup successfully. Afterwards I changed the splash screen timeout from 1 to 5 and retried with a normal button press while the AMI BIOS splash screen kept waiting: Success. A normal short button press worked now due to the updated timeout.