The right-click menu is a pop-up menu that is available when you right-click (click the the right-hand button on your mouse) on the map.
To access the functionality of the right-click menu, select the menu item you want. Where an arrow appears to the right of the menu item, it indicates that there are more choices that you can select.
For descriptions of all of the menu items in the right-click menu, see the right-click quick reference.