Caption
Note:
Caption is a dynamic property. Dynamic properties are identified by active labels that have a green underline that you can click to dynamically bind the property to a data source. To turn active labels on and off, use the Show Dynamic Properties command in the Object palette menu. See To dynamically populate a caption.
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Comb of <x> characters
Sets the pattern for displaying formatted values in a form, for syntax of the user input, for validating user input, and for storing and retrieving bound data or saving data when the form is not bound to a data source. See Patterns dialog box.
Sets the maximum number of digits that can appear after the decimal separator. If the maximum is exceeded, the number is rounded. If you deselect the Limit Trailing Digits option, the precision of decimal data is reflected exactly as it is entered.
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The object is visible on-screen, visible in the printed form, and occupies space in the form layout. Visible is the default presence setting for all objects.
The object is visible on-screen, not visible in the printed form when printed from within Acrobat or Adobe Reader, and occupies space in the form layout.
The object is not visible on-screen, visible in the printed form (when printed from within Acrobat, Adobe Reader, or directly from the server), and occupies space in the form layout.
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The object is printed when using double-sided printing. This option is useful when you want to place the page number in a different corner of the page when using double-sided printing than when using single-sided printing.
Renders the data according to the specified locale for language and country or region. You can select a specific language and country from the list, or you can specify one of these options:
See also 

Decimal Field properties in the Field tab