|User’s Guide: English 21FeaturesThe machine includes the following features: Help ButtonPressing this button causes the unit to print a Help Listand the Function List. Control panelSpecial programming keys, a 40-key plate for pre-programmed telephone numbers, and a 10-key pad forstandard dialing and programming. 80-character display (4 rows of 20 characters)Easy-to-read display for operation guidance, clockdisplay, function information, etc. Automatic Document Feeder (ADF)Capacity of up to 50 sheets of recommended letter/A4paper. Speed DialSpeed Dial numbers are pre-programmed telephonenumbers. There are two types of speed dial numbers:one-touch and 2- or 3-digit entry faxingOKIFAX 578040 one-touch100 numbers for 2- or 3-digit entry faxing.OKIFAX 598080 one-touch150 numbers for 2- or 3-digit entry faxing. Group FaxingCreate as many as 20 groups of telephone numbers andsend documents to multiple locations with a singleselection. Automatic alternate callDials a second (alternative) telephone number if thenumber originally dialed is busy.