I am compiling a large number of clips for a friend into a video. He asked me to use a still image at the outset, leading into the first video portion

He has now asked me if I can extend the time that still image is visible

So effectively where the image is located at say 0.00 seconds to 2.00 seconds he wants it to be equivalent to -2.0 second to 2.00 seconds on the Timeline

How can I put an additional minus 2 seconds to the start of the videos current start location - I cannot just extend it to the right as that impacts on the merged music soundtrack

The two options I can see, are literally to select every line on the timeline and move them across slightly, then extend the image to the left - the trouble with this is it would be easy to miss one of the smaller sections on the timeline and that doesnt then get moved.

Its a shame there is not a select all option for the Timeline.

Or option two is to produce the movie as is, then run a new project with that entire video and just redo the beginning

Am I missing an option

thanks
Andrew