cineSync 3.2 User Manual : 'In-Out' Points
'In/Out' points can be set on the timeline allowing you the ability to view part of the timeline only.
Only one set of points can be set at a time. The timeline outside the points will be greyed out.
If the points are set and Looping is on then the media will only loop between the points.
I = In point
O = Out point
Apple / Ctrl T = Toggle points on/off
C = Clear points