Add text, button, and choice widgets to a PDF document.
Widgets are interactive form elements that you can add to a PDF to make it easier to enter and submit information. Widgets are a special annotation subtype. To learn more about non-interactive custom annotations, see Adding Custom Graphics to a PDF.
Each widget type has several variations. A button can be a radio button, a check box, or a push button. A choice widget can be a list box, which is a table of options, or a combo box, which is like a dropdown.
Create a Widget Annotation
Create a PDF annotation of type
PDFAnnotation. This example initializes a widget annotation with rectangular bounds:
Specify a Field Type and a Control Type
widget that is a
PDFAnnotation. The three different subtypes are
PDFAnnotation. Here you will create a button widget for the radio button:
Adjust Widget Properties
Adjust properties to highlight the widget so it is more visible. The following example adds a blue background to a radio button widget.
Properties will be different depending on the field type. If you have multiple radio buttons and want to group them together, specify the same
field property. Specify different
button properties for each button if you should only select one at a time. For a text field, you can use
widget to specify placeholder text and
font to specify the font of the field’s text.
Add the Annotation to Your PDF
Add the annotation to the page.
You can combine many different kinds of widgets on your PDF. Using a combination of widgets can help you turn a PDF document into an interactive form. For more details on widget options, see