It’s me again. My experience with Sketchup is less than 5 days, so please bear with me if I ask dump questions. This is just a continuation of this topic,
Now I am into step 5.
Is there a way to merge all the rectangles into one single face, so that I only need to push/pull once, and not doing that one by one?
If they are not in separate groups or components (they are all in the same context), simply erase the edges that separate the individual rectangle, keeping only the outermost perimeter.
Then you get a single face that you can pull or push as you want.
Thank you Jean. It works nicely.