Q: What is the difference between Function Buttons and Right-click menu Creator?
A: The two modules can roughly do the same (make navigation items for users). Right-click menu-creator does it via Right-clicks that do not take up space, while Function Buttons are visual buttons (some find such more discoverable)
Q: How many right-clicks can I make?
A: There is a such no upper level, but you can max have a 3-level indentation
Q: If I make a level 1 menu header with a single menu item, it is not shown in a level structure but instead shown directly in the right-click. Why is this?
A: This is SAP's default behavior that we can't change... If only a single menu entry, SAP will always try to flatten the menu-structure