Hi @Leo_Bach1
While I think that making the dropdown selectors a little smarter is a good idea, what you’re trying to accomplish is better done in an Experience Page rather than a Dashboard Page.
Dashboard Pages are not meant for user input from within an Experience – really they should not be interacting with your Experience’s application logic (“Assign Sensors to Machine” for example). From within an Experience, Dashboard Pages should be focused on displaying device data or interacting with devices.
With that being said, I’d recommend adding a new page to your Experience that’s just a simple HTML form that’s populated from the data from an Experience Workflow.
I’m working on an example for you. For now, you should check out the Experience Views Walkthrough it touches on a lot of the concepts you’d need to build this.