Thanks, ATR,
I wll try this--but I still am unclear on how to do what the Manual says is possible: select clips on another track that WILL be moved, if I so desire, so as to remain synched to the main Video track.
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UPDATE:
In the case of inserting Freeze Frame, I just tried both Ctrl method and Alt method, and neither worked.
1. Put Video on Vid1 track
2. Put Music on Sound Track
3. Ran a few seconds of Vid
4. Stopped Vid, selected Freeze Frame
5. Held down Ctrl key while clicking "Insert in Movie" also tried with holding down Alt key.
Result: a 3 second still was inserted int the Vid1 track. A corresponding gap was created in the Sound Track.
6. Slid the final part of the Sound Track to the left along the timeline to re-connect it to the next segment created by the above process.
Result: the video following the final Freeze Frame was pushed to the right end of Video1 track.
7. Slid the Sound Track all the way to the left.
Result: the entire Video 1 Track contents were pushed to the right and divided in pieces.
I documented each step with screen shots which I can send if you want them and if I can figure out how to do it.
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UPDATE #2
In the case of inserting a video clip to the Timeline, I just tried both Ctrl method and Alt method, and neither worked.
1. Locate video in Project Assets
2a. R click video in Project Assets (pull-down menu appears), hold down Ctrl, click Insert to Timeline.
Result: Vid clip is inserted on Video 1 track, Sound Track is separated with a corresponding gap.
2b. R click video in Project Assets (pull-down menu appears), push Alt
Result: pull-down menu disappears as soon as Alt is pushed down.
I can stil drag the Vid clip but it's one more manual step...I love shortcuts!! 