D5 workspace / how to move

Is it possible to move the ENTIRE scene into the D5 workspace area?

When importing the scene from SKP, I didn’t notice that the model coordinates were far outside the D5 workspace. After adding a huge number of objects (greenery, trees, people, cars), I’m not entirely sure how to move everything into the D5 workspace. I’m concerned that having the model so far outside of that workspace might affect lighting, rendering, and stability.
When I move the model to the correct location, the added elements remain in their previous location.
Is there a solution?

arch.PXL