In a Print Dialog, it will be the Print Button. If you press your Enter key instead of clicking a button with your mouse, the default response will be assumed. Most dialog boxes also have a Cancel Button. Clicking on the Cancel Button closes the dialog without making any changes to your settings or document. Radio buttons and check boxes allow you to select several changes in a dialog box.
Radio buttons appear as a series of little, round buttons.
Check boxes appear as small rectangles, rather than as small circles. When you see options represented by check boxes, you will know that you can choose as many or as few of the options as you like. Left-click on a radio button or a check box to turn it on or off. Text edit boxes appear as rectangles. The rectangle may be empty, or it may contain default text.