This drop down nav menu is a native Carrd container that you're already familiar with. You can do anything here you can do in a Carrd Container.
Visibility Control for Carrd
The easiest way to show and hide native Carrd elements.
Find the unique ID of the element/container you want to show/hide/toggle. (toggle means hide if shown and show if hidden)
Add the function
visCtrl("toggle","text01")to the On Click section of your button or icon settings.
The function pattern can be repeated.
Add the "hidden" class to any elements that you want to start hidden.
Use case 1: Selectable Gallery
Save on screen real estate and let your visitors select which gallery to view.
Use case 2: Selectable Image
Save on screen real estate and let your visitors select which image to view.
Use case 3: Frequently Asked Questions
Only show the information relevant to your visitors questions.
I yam who I yam.