Epson Apex 20020 - Manual (Page 32)

Adjusting the Keyboard Angle
You can change the angle of the keyboard by adjusting the legs
on the bottom. Turn the keyboard over and lift each leg
upward until it locks into place, as shown below. You can lock
the legs into a low or high position, or leave them flat.
7
Setting the Front Monitor Switch
Set the monitor switch on the front panel of the computer to
match the type of monitor you are using. The monitor switch is
located behind the cover to the right of the keyboard socket
cover, as shown in the following figure. To open this cover,
push the top of the cover inward and then release it.