Symphony.

Is there a way to display a field in the publish entry edit section based on another field's input?

Yes, there's the Reflection Field... that should do what you need

https://github.com/symphonists/reflectionfield

Here's the page for it at SymphonyExtensions, but the README looks a little messed up, so check the Github page above for the latest details.

http://symphonyextensions.com/extensions/reflectionfield/

Thanks @firegoby. I don't think this is the extension I'm looking for. If I understand right, Reflection Field outputs xml based on the other fields in a section entry. I would like to display or hide fields from an entry publish form based on the input of some of the previous fields. I don't think Reflection Field allows me to do that. However, I think there is an extension that does just that but I can't remember the name.

@ovididust I haven’t come across an extension that does this, but there might be. However you could use backend_assets and jQuery your way to success. Shouldn’t be too hard.

I remember a discussion about exactly this topic from years ago, but I'm not sure if the extension that was built around this idea ever made it into a stable version - and it'S probably far away from working with a current version of Symphony. But it might serve as a good starting point for further development...