Overriding the specified resolution in the Multiboot header

[Liav Alb]

Hi,

I'd like to know if GRUB has a support for overriding the specified resolution 
in the Multiboot header.
I read the manual. I found the "gfxpayload" parameter:
https://www.gnu.org/software/grub/manual/grub/grub.html#gfxpayload
However, it seems that specifying the parameter for Multiboot kernels has no 
effect (the manual says this parameter is intended for Linux kernels). I wonder 
if there is some command / parameter I've missed.

Any help appreciated,
Liav