IT/Software/System Config/grub

Grand Unified Boot Loader

this is the default in linux.

Runs really well but has never been really intuitive to make changes

BECAUSE you normally should not be messing around in here.

Change the boot order

Boot the last booted

sudo nano /etc/default/grub

Now add the following two lines
GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true