Good work.  To go back to the computer's main menu, you can click the "Main Menu" button below the computer display on the far left.

Now try the scaling keys <default KEYPAD + and KEYPAD ->. You'll need to manually scale in for some operations, but in combat you can usually leave the scaling on the automatic setting of "Scale to Closest Hostile."

Navigate to the \iMessage\i menu and select \iNext Page/Clear\i again for more information.