An unbound report might include some fifteen or twenty pages of copy. These materials can be held together by one staple that is entered on the diagonal about three-quarters of an inch inward from the upper left corner. For a report to be bound, the general procedure is to place two or three staples down the left side of the report; with such a bound report, the left margin must be expanded from a single inch to one and one-half inches. No changes, however, are to be made in the other page margins. Bound reports require that headings be centered from the midpoint of the writing line. Usually, the initial page of a report is not numbered, but each following page must possess a number. The numbers can be keyed in several locations. A suggestion is offered that these numbers be placed at the top center of the page, some four lines down from the upper edge of the paper. The keyed page number is then followed by a triple space before the keying of the body is resumed. An option of the worker is to place hyphens before and after the page number. This use of hyphens serves to make the numbers more prominent on the page. The keying of reports demands an alert operator.