Configuring Date field

Configuring Date field

I have a date field in one of my registration forms. However, the current format is "dd.MM.yy" and I would like to change this to "dd/mmm/yy" like it is in one of my other forms. I looked to http://help.creator.zoho.com/Configuring-a-date-field.html for help, but the date format option is not available in my application settings for some reason...

What else can I do?