If you are a menu suite administrator, you can use the Navigation Pane Designer to create menus in the Navigation Pane. If you do not have design permissions, you can personalize your Navigation Pane.
There are two ways to create a new menu:
Create an empty menu that you fill in by cutting and pasting parts of another menu and by creating menu groups and inserting items, or
Copy a menu and then modify it
In addition, you can edit the menus that you receive from your solution provider.
When you receive an upgraded menu suite from your solution provider, a menu that you create (including a menu based on a copy of an original menu) will not be upgraded automatically at all, while the original menus will be upgraded to some extent, even if you have modified them. See: How Upgrades Affect Your Menus.
or
Now you can assign the menu to users.
About Designing Menus for Users
Keyboard Shortcuts for the Navigation Pane