How can I provide an extra description in custom field single selection from dopdown

[Inga N]

I am trying to setup a service desk and want to be able to provide custom drop-down options to pick from and provide mini description of what it means. Just like the below screenshot that I took from Atlassian support form itself, but can not reproduce it. What am I missing?

[John Funk]

Hi Inga,

You might want to try adding a Message type custom field to your screen right above or below the drop-down field that has the explanations of what each one is. But you aren't going to be able to add values like what you have shown. 

[Jack Brickey]

While you can certainly create a single select drop-down it does not provide an option to include a description. The best option would be to ensure that the selection itself is as self-explanatory as possible.