Thanks for your interest in our products. As far as I can see, you are trying to align the fields inside a PDF document already created. If so is the case, then in order to align the form fields, please try using Alignment property of FormFieldFacade class and try using the value AlignLeft value from FormFieldFacade enumeration. I would also recommend you to please visit the following links for more information on Decorate All Fields of a Particular Type in an Existing PDF File (Facades)
In case it does not satisfy your requirement or you have any further query, please feel free to contact.
Very helpful. Thank you!