Form field annotations allow the creation of interactive PDF forms which consist of a collection of fields for gathering information interactively from the user. PDF documents may contain an arbitrary number of fields appearing on any combination of pages, all of which together make up a single interactive form spanning the entire document.
Field names: Field names are used to allow multiple form field annotation objects to be independent of each other: form fields with the same field name always have the same text associated with that field name. When text is entered into one of the objects, the text associated with that field name is changed in all objects. To ensure unique text for a form field, you must give it a unique field name.
Form fields can have a maximum number of characters allowed in the
field. By default form fields are set a
Maximum Length value of
0, which indicates there is no limit. Any positive value will be used
as the upper limit of allowable number of characters in the field.
It is possible to specify the font and font size and text alignment individually for each form field.
When a form field is being edited, the tab key will tab to the
next field in the form. The tab order between form fields can be
controlled by dragging any field’s yellow sequence number to another
field. This will swap the order of those two fields. The
Form Fields menu item under the
Dynamic Annotations menu is
useful to clear any and all text currently in form fields in the
document, prior to exporting the document to PDF.