For text and numeric data that the user will type in, design the form to use text boxes or combo boxes.
For a single choice from a limited number of options, use radio buttons, a list box, or a combo box.
For a limited number of options from which the user can select none, one, or more items, use check boxes, or use a list box and set the form field properties to allow multiple selections.
For actions, such as opening a file, playing a sound or video, submitting form data, and so forth, use buttons.
For added security, add a digital signature field that verifies the user’s identity.
You can also make changes to individual form field properties, making it even easier and more foolproof for users filling in the PDF form.