We’ve added a nice feature for multiple choice fields so users can add their own custom option on the fly.
You can set this option for any multiple choice field in your forms. Just click on the field to edit and check the option to “Allow users to add new options”:
This will then add a “Plus” icon next to the field where users can add their own options:
These options will be added to the field’s format, so they will be listed as an available option for any future forms.