Single source photography posed another difficulty for United Stationers. Groupings of products are commonly used to accommodate space needs in the full-line catalog. However, some of the custom catalogs may feature only one product from the group. For instance, a desk set may be pictured for inclusion in the full-line catalog, but only the tape dispenser is being offered in a custom catalog. Or pens may be displayed to show an array of colors when only the red is being featured in a custom catalog. Again, United Stationers chose to make adjustments in the custom catalogs to retain the bulk of the efficiency achieved by working from one set of photographs. United Stationers decided it wanted to limit the expense of product photography and could accept cropping limitations for custom catalogs.