How to Create Drop Down Buttons in Hub?

[DaveSchaab]

I'm attempting to create a Drop Down Button for my Hub Site, but cannot figure it out.  I would like it to work like the "More" button at the top of Racine County's Hub Site: Racine County State of the County (arcgis.com)

Thank you for any help on this topic in advance. 

[SarahHartholt · Accepted solution]

this video is very helpful! Skip ahead to the 45min mark if you want to learn how to use bootstrap dropdowns.

https://www.youtube.com/watch?v=WiAnWWET9gE

[DaveSchaab]

Thank you Sarah!  This video was very helpful.  I had previously tried one or two bootstrap dropdowns that did not function correctly, but through this video I found some with functionality.  Thanks Again!