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1. Click on "Create New Menu" to create a new menu
2. Click on "Insert New Item" a few times to create a few menu items
3. Then select a menu item by clicking on it on the menu
4. Edit the Text ad click Update Selected Item
5. Select another item and click on "Delete selected Item"
6. Click on "Delete Menu"
You've just dynamically created a menu, some items edited them and then deleted them.
The functions used are displayed in the text area for your reference