When you right-click, you will get a sub-menu appropriate for the context on which you clicked.
To quickly access frequently used programs instead of having to mull through the start menu and its sub-menus.
sub-menu
A menu is a hierarchical arrangement of functions and menus of functions. Each responsibility has a menu assigned to it. and the sub menu is menu inside the main menu. we can say that group member of any menu is known as Sub Menu. we can take an example of "File" Menu of MS-Word, In File Menu We can Find Several Sub Menus like Save, SaveAs, Print, and etc. Mr. Gauro NETSA
The little black triangle to the right of a menu item indicates that there is a sub-menu of items for that menu item; if you hover over the menu item or click on it the sub-menu should pop-out to the side of the menu.
It is a menu that is part of another menu. So you can have main menu and when you choose one of its items and it shows another menu, that is a sub-menu. It is more a part of versions of Excel up to version 2003. So, for example, on the Edit menu there was a sub-menu with options for Fill.
a sub-menu with additional menu options appears
the function of start menu is to easy to see the document
Move the mouse pointer until it rests on the start icon at the bottom left corner of the screen, and click it with the left mouse button. The start menu will open up. There are small arrows next to several items in the main menu. These arrows indicates that a sub-menu exists. Place your pointer on Programs to open up the Programs sub-menu. The double arrow at the bottom of the programs sub-menu indicate that some programs in the menu are not presently displayed on the screen. Click on the double arrow so that all the programs are shown. Some items in the programs menu, such as Accessories, have sub-menus on their own. You can choose an item in the menu by single clicking on it.
Both A function and a Sub carry out a procedure, but only A function returns a result while a Sub does not return a result.
a list of additional commands is a sub-menu
Pop up menu: This menu can be displayed anywhere on the page with a right-click of the mouse.Pull down Menu: This menu can be displayed when you click or bring mouse on menu then list of sub menu will be displayed under the main MENU.