How to change add a required field entry?

I set up a data collection form for a client - http://barrowhill-vets.com/voucher.htm

but they wanted the mobile number to be a required field as well as the e-mail address. I stupidly just duplicated the e-mail required field and changed the wording to mobile number, but now all the entries have 2 mobile number replies and no mobile numbers.

How do I add a required field with the asterix?

Thank you for your help

Hello. Please note that you can make fields required or remove this status in several ways. You can click on the field, and change its Required property from the toolbar above.

Or by clicking on the little gear shaped icon of the field (same as right-clicking a field), and then clicking on Required.

To fix your form to have a Phone field, rather than a second email field, please first remove the bad phone field:

Now, from the Quick Tools on the left, marked with 1, add a Phone field to your form, marked with 2. Then, make this Phone field required, as marked with 3.

Please let us know if you need further assistance.