The Current Channel list-box displays the name of the current GeoFluv™channel that the user is designing. The main valley bottom channel was specified in the Settings tab and this channel is the first listed in the Current Channel tab. Channels that are tributary to the main valley bottom channel are added in the Channels tab using the Add button. The user can see a listing of all channels that are built by left-clicking on the down arrow to the right of the list-box. Then left-clicking on a channel name will make that channel be the "current channel".