How do you create hierarchical popup menus?

While SuperCard supports hierarchical menus and popup menus, it does not allow you do have both at the same time. For this you will need to resort to an external. Vendors of such externals include Royal Software, Frederic Rinaldi, and Fourth World. See the appendix for contact information. NOTE: The Macintosh Human Interface Guidelines recommend not using hierarchical popups, as listed on page 86 of that essential volume: Never create a hierarchical popup menu. Doing so would hide choices too deeply in the interface. It would also create an element that would be far too physically difficult to use.