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The radio button is one of the PDF form controls, which are used to provide PDFs with data-collection and submission capabilities. A radio button is a control that functions like a switch and can be either on or off (like a check-box) except that radio buttons can be organized into groups of which only one can be checked at any one time - this is done by giving all of the individual radio button controls that are to be grouped the same name attribute. A radio button can also have one or more actions associated with it, such as going to another page in the file, resetting all the form-fields to their default values and so on; these actions can be triggered by a variety of events associated with the radio button.
Grouped sets of radio buttons can be manipulated programmatically using Javascript, as can all other PDF form controls. This is useful for computing results from values that have been entered in other parts of the form, validating values that have been entered, interacting with other aspects of the document such as bookmarks, layers, comments and so on.
Nitro PDF Professional fully supports PDF form use, creation and editing, including all of the common form controls: text fields, radio buttons, buttons, and more; and also features full support for PDF Javascript.
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