I am a bit surprised how difficult it has been to find an answer to this question.
I am using classic jira service desk and would like to add more fields to the customer facing service desk portal. For instance, right now there is just a summary field that is displayed.
I would also like to add a description field to capture a detailed description of the problem and also a custom list field so the user can select from a defined list of issue areas.
I cannot find how to do this in the project settings. I see where you can edit Request Types but I don't see anything on adding custom fields.