The properties of a field allow you to customize how that field’s data is stored, handled or displayed.
Speed up searches on fields that are searched frequently, joined in queries, or sorted
Set the maximum size for a Text field, or the number size for a Number field
Set how many decimal places to display for a Number or Currency field
Define the display format for a field, such as a date's format
Define a value that is automatically entered when you add a new record
Limit data entered in a field to values that meet a certain requirement
Require that data be entered in a field
Allow zero-length strings to be stored in a Text, Memo, or Hyperlink field
Read about compressing the data in a Text, Memo, or Hyperlink field