Creates a push button with one widget on page, showing Caption.
public PdfPushButtonField AddPushButton(string name, PdfPage page, PdfRectangle rectangle, PdfFieldOptions? options = null)
The field's fully qualified name, as for AddTextField(String, PdfPage, PdfRectangle, PdfFieldOptions?).
The page the widget is on, a page of this form's document.
The widget's rectangle, in default user space.
The caption, its size and colour, and the widget colours; null for the defaults.
A entry.ISO 32000-2 §12.7.5.2.2. A button field with the Pushbutton flag, merged with its widget, whose appearance shows the caption
(MK CA) centred in the form's Helvetica. Otherwise as AddTextField(String, PdfPage, PdfRectangle, PdfFieldOptions?) describes.