How do I install boot manager in Linux MATE 18.04 or how do I control which operating system is selected by default when you first turn on you PC and GNU GRUB comes up shows you a list of operating systems you have on your computer without having to manually edit that grub.cfg file?
There used to be a program that would allow you to change the background of the GRUB screen and selection time and what OS to boot by default or have the option to have it high lite the last OS booted.