Abstract: Indexing overlay for computer display devices such as CRT's and plasma displays. The overlay consists of a sheet of hi-static vinyl, acetate or the like of a size to conveniently cover the display area of columns and rows of discrete displayable positions. The sheet is of a thickness so that the overlay can be electrostatically attachable to the face of the display device. A set of first indicia defined discrete columnar positions along a row. Another set of indicia break up the first indicia into discrete fields five indicia wide. One set of labeling indicia accumulatively number the columns from left to right and a second set of numbering indicia may be used to accumulatively number the rows from top to bottom. The indicia are imprinted in reverse on the back side of the sheet in black or bright color ink. The color is selected to give high contrast to the indicia against the type of display background upon which the overlay is used.