You can access Acrobat form field properties only when you are in editing mode (by choosing Forms > Edit Form In Acrobat or Tools > Advanced Editing > Select Object Tool). You can change the properties for a multiple form fields at a time.
To edit a single form field, double-click it or right-click/Control-click it and choose Properties.
To edit multiple form fields, select the fields that you want to edit, right-click/Control-click one of the selected fields, and choose Properties.
If you select form fields that have different property values, some options in the Properties dialog box are not available. Otherwise, changes to the available options are applied to all selected form fields.
To avoid accidental changes
to the form field, select Locked in the lower left corner of the
Properties dialog box before you close it. To unlock, click the
check box again.