Group/lock audio clips together so they never get shifted out of place
You know how in some drawing programs, you can add 3 rectangles, 2 circles, and an arrow and arrange them on the canvas, and after you are satisfied with where they are placed, you can select all these objects by holding down the Shift key and select "Group", so that these selected objects are grouped together as one unit, and you can then move them around on the canvas as though they were a single object.
How can I do this in iMovie? I need to group/lock all my audio clips that I have spent so much time positioning precisely relative to the video clip(s) and relative to each other, so that they can't get accidentally shifted out of place when I remove or add video clips later? I am using iMovie 10.1.15 on Mac OS Catalina.
iMac 27″ 5K, macOS 10.15