Daryl,
I don't think it's a setting anywhere. You could create a builder that would iterate through your form and remove the alias. Although I'm not sure why you'd want to do this unless you are trying to allow the form to work with different tables.
>Can I prevent the table alias name from being included in the field name when dragging and dropping an element from the data environment table viewer? LastName instead of Employee.LastName. I know I can manually open and remove it, but wanted to supress it if possible.