A screen should only be positioned on one side of the desk if the user is able to
reposition the chair so that they can align themself in front of the equipment when it
is in use. The only type of user who could possibly justify working with the screen
to one side of the seated position would be a copy typist who simply reads printed or
written text as they type and do not refer to the screen throughout the keying operation.
Even copy typists, however, should sit in front of the screen if interacting with
it, as when editing previously typed text.