If you're in the middle of creating your new form and find you need a new custom field/property, you can create this property from within the form itself. To create a new custom property from inside your form, follow the instructions below:
- From within your form on the Add form field tab, click Create new.
- Enter in all your contact property, select the desired field type. You can expand Advanced Options to modify the internal name or add it to a specific property group.
- Once your new property is all set, click Save.
- Once you've created this property, you'll be able to click or drag and drop it into your form.