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An interactive form (sometimes referred to as an AcroForm) is a collection of fields (such as text boxes, checkboxes, radio buttons, drop-down lists, and pushbuttons) for gathering information interactively from the user. A PDF document may contain any number of Fields appearing on any combination of pages. All these fields make up a single, global interactive form spanning the entire document. While PDF forms are similar to HTML forms, there are some important differences:
PDFTron SDK fully supports reading, writing, and editing PDF forms and provides utility methods to make working with forms simple and efficient. Using the PDFTron SDK forms API, arbitrary subsets of form fields can be imported or exported from the document, new forms can be created from scratch, and the appearance of existing forms can be modified.
Forms Data Format (FDF) and XML Forms Data Format (XFDF) contain a list of Form Fields with their associated values. These formats can be used to import and export form data to and from PDF Form Fields.
PDFTron SDK benefits include:
Major features of WebViewer form support:
Importing and exporting forms
To import and export annotations with a PDF document.
Create new form fields and widget annotations
To create new form fields and widget annotations within a new document.
Modify form fields
To modify properties for existing form fields.
Fill form fields
To fill values for existing form fields.
Styling form fields
To fill in values for existing form fields.
To flatten form fields in a PDF document.
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