Unavailable.
the command is not available it is used in windows.its means at time execute command
When a menu command in Windows is greyed out or dimmed, it means it is not available. It is possible that the user does not have enough privileges to use the command.
When a menu item is faded it means you cannot access that option. Most of the time the option is faded when it does not apply to the function your have accessed.
sub-menu
Menu-driven simply means you execute the application's commands by selecting them from a menu, as opposed to command-driven whereby you enter (type) the commands manually.
It means that no action is directly taken after you press that menu item. It most likely shows you an extra dialog before taking some action. A menu item without three dots mean that the action is taken directly (e.g., an Exit-command).
a phone system that is based on menu processing instead of command processing to user command.
a submenu
The answer is submenu.
Open a menu of commands.
Short cut menu of course