It is recommended that document holders be used when performing keyboard work. Use of a document holder will avoid an undesirable inclination of the head or a sideways bending body movement when shifting vision between the document and the screen or keyboard. Preferably, the source document will be at the same distance and approximate viewing angle as the screen if VDU work is involved. This will minimise head and neck strain.
Poor legibility of source documents and, occasionally, inappropriately designed holders for the source documents often restrict their use. Keyboard operators who have not used a document holder should be encouraged to persist on the trial use of an appropriate holder for a minimum of two weeks.
The holders should be stable and free from vibration when attached to the desk.