This is the menu entry title. The text you provide here will be presented in the boot menu.
With the root options you can set where Grub will find a kernel or boot file to load.
With this option you can choose if this menu entry will boot from a hard disk or from a floppy disk. You can also choose to not include a root option at all.
This option allows you to select on what hard disk or floppy disk the boot files are located in.
This option allows you to select on what partition the boot files are located in.
If you want to add an entry for the FreeBSD operating system, you may want to provide the FreeBSD partition your boot files are located in.
If the partition where your boot files are in is outside of the area where grub can read, disable this option.
These options allow you to configure the kernel to load and its options, if the system you want to boot allows you to.
Note that the paths you specify here is relative to the root partition you provided trough the root options, and not to the root partition of your operating system (yes, maybe both are the same).
Here you must specify the kernel file. Note that the path you must specify here is relative to the root partition you provided trough the root options, and not to the root partition of your operating system (yes, maybe both are the same).
This option allows you to specify parameters to the kernel this menu option will load. For systems like Linux, you'll probably need a "root" option here.
Here you can specify a module for the kernel to load. This is useful for operating systems like GNU/Hurd and Mach.
This option allows you to specify an initial ramdisk file, usually refered to as initrd.
If the kernel you've specified is a NetBSD ELF kernel, you must turn on this option.
This option allows you to chain-load a specified file or the specified partition's first sector.
If you've specified to chain-load a file in the above option, specify its path here.
This option allows you to make the partition active before chain-loading it. It's useful in operating systems that require an active partition to boot.