Select this option to view a form that contains fields for interactive data capture. When you preview the form design, the resulting form opens as an interactive PDF.
Select this option to preview forms that will be printed on one side of the paper. When you preview the form design, all objects are non-interactive.
Select this option to preview forms that will be printed on both sides of the paper. When you preview the form design, all objects are non-interactive.
Select this option to generate sample form data. When you preview the form design, it will be merged with the sample data. You can also indicate how many times to repeat a repeating subform in the previewed form design.
Specifies the data file to use when previewing how a form design will be merged with data. The data file must be in standard XML format. You can type the path to the data file in the Data File box or browse to the file.
Specifies the preview format for forms saved as Adobe XML Form File (XDP). You can select one of the following options:
Sets the default preview format to Static PDF. The form design can contain only static elements. If your form design contains dynamic elements, they will be unavailable in the form. For example, if you have a form that contains a table in which the number of columns are fixed but the number of rows in the table will change depending on how much information is in the data source, only one row of data is shown in the Preview PDF tab if the minimum number of occurrences is set to 1.
Sets the default preview format to Dynamic PDF. The form design can contain dynamic elements. For example, if you have a form that contains a table in which the number of columns are fixed but the number of rows in the table will change depending on how much information is in the data source, all the rows of data are shown in the Preview PDF tab. You can also test adding a row to the table, which you could not do in a static PDF form.
See also 

Preview tab (Form Properties dialog box)