Sometime I need to access grub. I have the timeout to 0 but I can still call the grub menu by pressing ESC or leaving SHIFT pressed. What I want is to change that so for example, to get the grub menu I would need to press another key or key combination.
I do not wish to change the grub menu timeout. I like it to boot fast, all I want is a way to make the key or keys to show the grub changed to another combination.