Maybe possible by pressing shift and the FX ‘on’ button so it flashes to show its not fully engaged. Then tweak the parameters to get your desired effect then press ‘on’ again and light becomes solid and effect is engaged. And if you change your mind and don’t want the effect just press shift and on again and light goes off?
Why not make it Shift + Cue to have the cue flash. This would put you in Cue FX mode. Press cue again to turn the Cue FX off. That might be easier. Hey @DenonDJ_Support_DE can you make this thread a reality with a future update?
Yeah could work. Only danger there is if you accidentally miss hit the shift button and end up pressing cue by itself - track will go back to start/cue point. Not good in a live environmental. I’d be paranoid every time I went to press it!