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To change the validation settings, click on the field, then click on the little gear in the top right corner of the field. This should bring up the settings menu. From there, change the validation to alphanumeric:
That should allow for both letters and numbers to be entered in the field.
If you have any further questions or would like to have us check one of your forms, let us know and we will be happy to help.
Thank you! That works. I appreciate your prompt response.
On behalf of my colleague, you're most welcome :)
Do inform us if you need further assistance.