Click the menu tab on your dashboard. At the top you can view all menu labels, click the arrow beside each option to make changes, drag the active menu items to re order them at any time. Check any item in the category tab to add to your menu options.
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Check any category to add it to menus, remove or change any menu item by clicking on the arrow to show options. Click the arrow again to hide it. Take your time with menus and look at changes to make sure they reflect what you were trying to achieve. Anything you do can be undone, checking after every change makes it easy to remember exactly what you changed.