iMovie Add Title at beginning of project, retaining all other spacing

I know how to add a clips/backgrounds with Titles superimposed, anywhere in the timeline.

I want to add that at the beginning of a movie project that has detached audio and several split clips in both the video & audio timelines.

It appears if I add my background/title to the front end of the project, I must then manually move all the video & audio timelines forward, which knocks many split portions out of sync with each other or the detached audio.

Is there a way to add some extra 'seconds' or clips at the front end that moves everything else - video timeline, audio timeline, image timeline - forward while retaining all spacing & sync?

Alternatively, is there a way to select every timeline, clip & spacing, like a 'Select All,' so that when they inch forward, they all stay in sync, in spite of the many breaks & splits?