Suppose you try printing something and you don't get any line feeds—the lines are printing on top of each other and all you get is one line of typed smudge. Set the automatic line feed switch on your printer to ON or use the Add LF After CR option to add an extra line feed after each carriage return.

When you send a message through your modem, you can elect to have the message displayed on your own screen as well as on the screen it's being sent to. This is called echo, and it's a nice way to assure yourself that your message is being sent correctly. In most cases, you won't need to select the Echo option because the computer you're sending the message to will probably send an echo of the message to your screen as a way of confirming that it received your message. If you select the Echo option and the other modem sends an echo, you'll be seeing double.

A full-duplex modem will echo characters back to your monitor. A half-duplex modem won't. If you're communicating with a full-duplex modem, set Echo to No. If you're communicating with a half-duplex modem, set Echo to Yes. If you don't know what kind of modem is on the other end of the phone line, select Yes. If you find everything coming through double, change to No. Most information services, like CompuServe and The Source, use full-duplex modems.

The buffer is a special holding area in RAM that holds information until the computer or peripheral device is ready to deal with it. Don't change this setting unless the manual that came with your device tells you to.

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Appendix A: The Control Panel Program