Browsing French translation

111.

Scripts are generating menuentries. So every menuentry belongs to a script. They are shown as top level groups when activated. However in contrast to submenus they aren't shown at the boot menu.

135.

This option allows choosing the operating system which should be selected when booting. By default this always is the first one. This option means that the default entry selection stays the same when placing other operating systems there.

In contrast to the first option the other choices are referenced by name. So the default system isn't changed when moving to another position.

If you want to use another reference like "always point to the second entry" you can use the last option which allows typing a custom reference. Usage examples:
1 = "always point to the second entry" (counting starts by 0)
test>0 = "always point to the first entry of a submenu named test"

179.

please note: large fonts on low boot screen resolutions can corrupt the boot screen
Because this problem depends on chosen font, it isn't possible to define a general maximum. When you're trying to select a larger font, please do it in small steps (rebooting and checking the results).
The problem occurs when the grub gui elements (borders, description) wont fit into screen. So while there's enough vertical space you can try a larger font. The mass of menuentries is not a problem - they are scrolled if required.

The corruption results in a endless loading time of grub2. You need a live cd to fix this:
* delete the font from (MOUNT)/boot/grub/unicode.pf2
* reboot your system (menu should show up with default fonts)
* open /etc/default/grub with root permissions and place a '#' in front of the line containing GRUB_FONT
* then run grub customizer to choose the font used before

182.

Alternatively to the simple theme method which provides some options like color, wallpaper and font you can install complex theme packages to get an even better looking boot menu.

There are several download sources like this thread at ubuntuforums.org:
<a href='%1'>%1</a> (needs account)
or search for '%2' at <a href='%3'>%3</a>

Just download such a package (which is in tar.gz format in most cases) and add it to the list of available themes by using the add button next to the theme chooser.

After changing the theme you'll see a simple editor which gives a preview of images and allows some file management. Modified theme contents will be saved when you're pressing the save button.