Adobe ACROBAT READER 7.0 Manual page 74

Elements of an Adobe Acrobat PDF form
A PDF form created by Acrobat Professional can contain the following form elements:
Button
Can specify an action, such as opening a file, playing a sound, or submitting data to a web
server.
Check boxes
Presents a group of choices from which you can typically select one or more items.
Combo box
Presents a list of items in a pop-up menu for you to choose from or lets you enter your
own values.
Document Message Bar
Displays information about the PDF form and displays tools.
List box
Displays an entire list of options that you can scroll through and from which you may be
able to select more than one item.
Radio buttons
Present a group of choices from which you can typically only select one item.
Text field
Lets you fill in text such as name, address, and phone number.
Digital signature field
Lets you electronically sign a PDF document with a digital signature.
Adobe Acrobat PDF form A. Combo box B. Digital Signature field C. Text boxes D. Forms
Document Message Bar E. Check boxes F. Radio buttons G. List box H. Buttons