How do you make the initial value on a dropdown field blank?

[Anonymous]

How do you make the initial value on a dropdown field blank and have that trigger the required notification if the lead does not select a value?

[Anonymous]

Thanks, I did that and it wasn't working, but discovered that it was because I had been cookied.

[Anonymous · Accepted solution]

in the Form Designer, select the field that you wish to edit. 

In its Field Specific Form Properties, select the Value field and add a comma at the start of the list of values similar to the screen shot below.