I'm in the beginning stages of building an app for astronomy use (listing common objects in the sky) and am currently using buttons to select different objects. I was suggested on another forum to use something like the gadget you use to input time into a clock (sorry, can't post a image

)instead of buttons, as the list could get quite lengthy.
I looked around on App Inventor a bit and didn't see anything that offered this functionality, am I right? Is there any other way to do this?
Thanks