Hey guys,
When you have a cuelist that is set to chase mode, the fixtures will be triggered on the selected beat (1/1, 1/2 etc)
When you have a single cue, normally, you shouldn't use the chase-function. Then you can change the fade-in/out time in the cues.
When you have multiple cues, and you've set it to chase mode, then you can change the fade-in/out with the Attack-fader.