[amsat-bb] Knwd TH-D74A question

I just got a Kenwood TH-D74A. I'm trying to enter my callsign so I can do APRS. I got the AI9IN part, but how do I enter the - (dash) that goes before the SSID? I can't find the instructions for that anywhere. (I admit to finding the programming of this radio to be a little overwhelming. I can't even get past entering my callsign.)

Steve AI9IN