On an InDesign CC from, I would like to have a combo box which is a "first-level" menu that has 5 list values. When one of the list values is selected, I would like a corresponding combo box to become visible so that the use can select from this "second level" combo box. Is there a way to accomplish this in InDesign CC? The reason for doing this is that I want the user to only see the list values on the 2nd level combo box that pertain to what he/she has selected on the 1st level combo box. This would mean that I would have the main comb box and five second-level combo boxes.
I don't think combo button support this feature.
But you can achieve something like this with radio and check buttons (show and hide action), here is my try: