Hello, i need a solution to lock playbacks among themselves on the on-screen playback If I create 6 playbacks , i wish to make 2 groups of 3. First group : play back 1 / playback 2 / playback 3 2nd group : playback A / playback B / playback C http://www.imabox.fr/15/03/071522T82nEn14.jpg http://www....