A copy holder for use with a portable notebook computer is provided, having rectangular, relatively stiff sheet elements slidably disposed between upper and lower parallel channels affixed to the back of a computer screen. Hollow tubular members of square cross section are fixed at the top and bottom edges of the support sheets to slide laterally within the upper and lower channels. In one embodiment, multiple sheet elements may be arranged to telescope from the back of the notebook computer screen to adjust the size of the copy holder. Two copy holders may be slidably stored on the back of the notebook computer screen so that either or both may be extended laterally to support copy on either or both sides of the screen. The copy holder includes a support member that can be used to support the copy holder as a stand-alone copy holder.