Loop Cue

Hi I am just trying to prepare to call up loop cues ready for gigs, but I am struggling to learn how to turn them on with the unit.

I am preparing them in Rekordbox by saving a memory cue with a coloured tag. But I don't have CDJ NXS2 at home to actually try it... and id rather know my settings are correct before I leave home. And know what button to activate it.

Basically I want to set hot cue button 3 as an active loop. So I just press it, and it automatically plays the loop from that point.

I notice the memory cue has an orange loop emblem, that changes to red if I click it.