Operating a copy machine is not exactly rocket science. You can run it through the SmarThru 4 software or simply by using the seven control-panel buttons which are similar to any copy machine available. There’s a two-line LCD display for menu choices like number of copies, shrinking or enlarging documents, adjusting printout darkness etc. Everything is simple and intuitive – our only complaint is that the LCD could have used some backlighting, and, as we previously said, the SCX-4100 lacks an automatic document feeder to make copying originals faster. This all-in-one copied documents at 6 ppm.