After adding captions throughout an entire sequence, I need to insert a clip at the beginning. When I do this, the captions don't shift! 1. How do I lock the captions to the video? 2. If this is not possible, how best to bulk shift the timing of all captions (after the point of clip insertion, whch in this case is the very beginning of the sequence but might not always be so). 3. Should I be captioning via some mechanism other than "subtitles"? Thanks for your attention.