The first column of the cuelist is marked "WAIT" - enter a time in that column.
For example...
Cue 1 has a fade time of 3 seconds
If you want Cue 2 to start immediately as Cue 1 finishes, change CUE 2's WAIT TIME to "follow." If you want Cue 2 to start 1 second after Cue 1 - you can use either "4" in the wait time or "Follow +1" If you want Cue 2 to start BEFORE Cue 1 finishes, put the time in for however long to WAIT once Cue 1 is run before executing.