Setting options for fields
• entering default data into fields to make entering data fast, accurate, and consistent (for example, FileMaker Pro can perform a calculation to automatically format a phone number)You can add, change, or remove data entry, validation, repeating, storage, and indexing options for all field types except summary.FileMaker Pro doesn't update existing records if you change field options. You can find existing records and change the data, if needed.Important To avoid confusion when using dates in FileMaker Pro, set field validation options to make sure dates are always entered with four-digit years. For more information, see Defining field validation and Conversion of dates with two-digit years.