Verify the new satellite is correctly positioned. If you need to fine tune the satellite, use the adjustments in MENU 1. Typically the 100C plus will display both bands for the designated satellite. After the C-band satellite has been added, do a channel scan using MENU 4. You can periodically do a channel scan and capture any new Ku channels that come online.
Channel scans take several minutes to complete.
You can re-name any channel using MENU 4. If you want to change the channel number use MENU 1. If you need to add a Ku channel and assign a frequency and polarity this will require that you have already done a channel scan and a Ku channel has been assigned. Rename the channel while still in MENU 4. Also assign a new channel number using MENU 1.