Document holders, or copy stands, should be provided in situations where an individual has to refer to documents while interacting with the screen or keyboard.
Typically,
many users place their source material on the desk surface alongside their
keyboard. As a consequence, as they look down they have to bend the head and neck
forward. They will also have to rotate the head repetitively as they look from the
document to the screen. Neck posture has been found to be a risk factor for neck pain