I've added in frequencies and related information that I've discovered, "spun" the knob many times to scroll through the numbers, characters, upper and lower case alphabet in order to spell out information on the display, but only for conventional systems on both my "996's" and SDS200... I manually programmed many "scanners" for decades prior to getting "996's" and now SDS200, it really wasn't too difficult to do. My "780" (still in daily operation!) was my first radio with a display capable of oodles of information, that was very time consuming entering the information manually!