Select Lock Source Time to clone a single sourceframe (at composition time Source Time); deselect Lock Source Timeto clone subsequent frames, with a time offset (Source Time Shift)between the source frame and the target frame. The clone sourcetime automatically loops back to the starting sample point when thecurrent sampling point goes beyond the end of the duration of thesource layer. This looping is especially helpful when you have alot of frames to repair in the target layer but only a few goodframes in the source layer.