Goto 0
Cue 0 does not exist as a real cue. It is an imaginary cue before the first cue.
Press Goto 0 to take all levels from the cue list to zero, and prepare the crossfader for the first cue.
The cue list will show a blank line as the active cue, and the first cue will be displayed in red to indicate that it is the next cue.