Hi, thanks Borate for the further reply. I looked at this again last night. In fact, the effect that I want: being able to trim (to reduce or increase) the duration of a single clip on a sequence without effecting other clips, occurs if there no gaps between the clips and all the audio clips are linked to the video. However, if there is an unlinked audio track in the project then the editing behaviour changes, and reducing the duration of one clip creates a gap in the video track, any increase in the length of one clip potentially results in a reduction in the length of a clip next to it. So, my question is: is it possible to trigger the first kind of editing behaviour: ripple editing etc, when there are unlinked audio tracks in the project, eg a soundtrack? I hope this is clear. Thanks again for your help.