Is there a way to add a dropdown menu on the selection page?
You can use prompts for that. In the data model you'll assign a prompt to that column, when you add it to the selection page you'll be able to click on the [?] next to the column and a drop down would pop up. You may need to develop a prompt if you don't have for that field/data.
Thanks
Thanks
*Community Hub is the new name for Sage City