Buttons 
Most screens include command buttons which are used to execute other procedures and to complete or exit a screen. To press a button, position the mouse pointer over the selected button and then press ("click") the left mouse button. If you are not using a mouse, you can tab to the desired button and then press the Enter key. In most cases you can also use the Alt key method described in the Frequently Used Keys topic. Alternatively, you may elect to use a "Touch" monitor for most mouse functions.