Most copiers have fixed lenses that copy at predetermined percentages, usually two or three settings smaller or larger than actual size. Advanced units use a zoom lens that can copy between 50 and 200 percent of actual size. Allows you to adjust the copy contrast lighter or darker. Advanced models have a photo exposure setting that adjusts contrast to enhance reproduction when copying a photograph. You can buy clear acetate sheets for overhead transparencies, but make sure your copier can handle them.
Many copier companies have single-color cartridges available.
To make a full-color copy, you need different originals and make multiple passes after installing each color toner cartridge. For instance, if you are making a flyer and you want the company letterhead in red, the original flyer would be copied in black without the letterhead. These copies are then sent back through the unit with the letterhead-only original on the glass platen and the red toner cartridge installed. Offered as an add-on, this feature allows a copier to feed originals. The SADF is usually a single-sheet feeder that positions the original on the glass.