I've created a form and I'd like to use the Dropdown choice to appear in card name.

[Richard DeYoung]

I've created a form with a person's name, course name, company name, etc. The person's name seems to be the default linked to the card name, but I want to change that to the course name, which is a drop-down choice. 

How do I change this? 

[Carolina Lopez]

Hi Richard, welcome to the Atlassian Community!

I hope you're enjoying Trello.

Could you please let us know how you're creating the forms? Are you using a Power-Up?
This info would help us understand your situation.

[Richard DeYoung]

Yes, I'm using the "Forms" Power-Up.

[Carolina Lopez]

Thanks for the details! I tested and don't think it's possible with the Power-Up options as the Name field is by default a text type, and the dropdown type fields are only available for Custom Fields, so the info would go automatically to the Custom Field after the form is filled.
You can contact their support to confirm this, there's an option on the Power-Up page to do it.

If you don't want to contact them or if they confirm it's not possible, you can try using an Automation rule to reach this result.
I tested with this rule, considering that the Custom Field name is "Course", and it worked for me:

when custom field "Course" is set, rename the card to "{{%Course}}"

You can check these articles if you're not familiar with automation:
Automation overview
Automation variables