A bypass tray reduces the risk of a paper jam by offering an alternative short, straight-paper path. It enables you to copy straight onto originals - such as coloured paper, odd-sized paper, or card stock ? i.e. materials which cannot be fed (or are inconvenient or impossible to feed) from the regular copy paper tray inside the copier. Bypass trays can handle anywhere from 1 to 100 sheets. A popular use is in colour copiers for printing onto stiff covers or transparencies. Bypass trays that can hold more than one sheet are called stackable bypass trays.