Trying to keep this short: I'm trying to use Adobe InDesign's 'Buttons and Forms' to create a Combo Box, listing quantities of tickets available for purchase: "1, 2, etc". When I create the rectangle and set it thusly, adding each value to the list, all I get is a rectangle with a dotted boundary. No icon that signifies this is now an interactive element. Upon exporting to PDF, the rectangle is simply a flat color block with no interactive element. (Screenshot below)
Is there a step I am missing? Or some preferences that may not be checked properly?