Andrea_paz, Nested clips may be used for differents goal/scenarios. Two stupid examples. 1) Consider you want to make a kind of flashback-rewind at the end of your video (your "whole" life in a istant). You have, in timeline, 60 seconds of edits with clips, cuts, zoom in, zoom out and so on. And you want put this 60 seconds "compressed" to 10 seconds and play in reverse (and also in black and white colour) at the end of your video. Then you can copy the 60 seconds in a clip, nesting that clip and put it in timeline. You will see only a clean clip. And then you will add the Reverse effect and Speed effect (and Color3way for the black and white). Your timeline will be more clean. 2) You are working in a Team or You are alone and your project is really complex (see Deim @deim31 problem?) Then you can create some sequences that you (or the Master director) will use in the Master project to merge the sequences in the right order and to make the final colour correction step. Finally, the good thing of the Nest feature is that you you can see your Timeline really clean. I don't know if it can help. IgorBeg