You had to manually edit a configuration file using the terminal or text-editor but still even changing something simple like boot menus was a bit risky unless you know what you were doing. But now it seems that those days are long gone, not only one, but there are a lot of applications that let you do that graphically!.
The one that I'm going to reveal is called "startupmanager". After installing it you'll be able to change the things like...
*. Time-out settings.
*. Boot sequence.
*. Boot logo's resolution.
*. Color depth change.
*. Remove text or logo during boot, etc are just a few to name.
So, open your terminal and issue the below command...
sudo apt-get install startupmanager
After installing it you should be able to execute it via "System" -> "Administration" -> "Startup-Manager" and make all those above mentioned (+ many more) customizations to the GRUB loader graphically.