The best I can think of is to use Grub Customizer. Youu will have to add the repo first before installation:
This PPA contains the latest release of Grub Customizer.
Simply run these in terminal:
sudo add-apt-repository ppa:danielrichter2007/grub-customizer
sudo apt-get update
sudo apt-get install grub-customizer
You can then launch it by pressing super key and type grub customizer or I assume in terminal sudo grub-customizer
Mine looks like image below atm. You will be able to change many things in your grub loader. I find that clicking save after making the changes does not write them to the grub loader, but rather clicking on File and then "Install to MBR" does what I needed. Hope this helps.
My current Grub loader