Enabling the Apple & Chimera boot screen to fill display?

[StudioK]

IS it possible to enable the Apple boot screen to fill the full extent of your display?
The splash screen for my Intel motherboard also appears this way---low resolution and not filling the screen. So does the F10 boot menu and the Chimera boot menu.

Is is simply a matter of updating my BIOS?

 

[StudioK]

I've added a couple of lines to the boot.plist to make it 1920x1080x32, and it appeared to have an effect (the Apple logo was smaller/higher res.), but......the splash screen still does not fill the full extent of my monitor.