How to manage the GRUB menu

Example 1 - Change the default boot entry 

# bootadm list-menu
The location of the boot loader configuration file is /rpool/boot/grub
default 2
console graphics
timeout 30
0 Oracle Solaris 11/11
1 Oracle Solaris 11.1
2 Oracle Solaris 11_test
# bootadm change-entry -i 2 title="Oracle Solaris 11-backup1"
# bootadm list-menu

The location of the boot loader configuration file is /rpool/boot/grub
default 2
console graphics
timeout 45
0 Oracle Solaris 11/11
1 Oracle Solaris 11.1
2 Oracle Solaris 11-backup1

Example 2 - Changing the menu timeout value

# bootadm list-menu
The location of the boot loader configuration file is /rpool/boot/grub
default 2
console graphics
timeout 30
0 Oracle Solaris 11/11
1 Oracle Solaris 11.1
2 Oracle Solaris 11_test
# bootadm set-menu timeout=45
# bootadm list-menu

The location of the boot loader configuration file is /rpool/boot/grub
default 2
console graphics
timeout 45
0 Oracle Solaris 11/11
1 Oracle Solaris 11.1
2 Oracle Solaris 11_test

Example 3 - Setting GRUB console type

# bootadm set-menu console=serial

possible values are serial|text|graphics

Example 4 - Setting the Title for a Specified Boot Entry in the GRUB Menu

# bootadm list-menu
The location of the boot loader configuration file is /rpool/boot/grub
default 1
console graphics
timeout 30
0 Oracle Solaris 11/11
1 Oracle Solaris 11.1
2 Oracle Solaris 11_test
# bootadm change-entry -i 2 title="Oracle Solaris 11-backup1"
# bootadm list-menu

The location of the boot loader configuration file is /rpool/boot/grub
default 2
console graphics
timeout 45
0 Oracle Solaris 11/11
1 Oracle Solaris 11.1
2 Oracle Solaris 11-backup1

or changing by specifying the current entry title

# bootadm change-entry "Oracle Solaris 11_test" title="Oracle Solaris 11-backup1"

more examples found at

http://docs.oracle.com/cd/E26502_01/html/E28983/gkvhz.html#glyxc