So, here’s the scenario:
I have a well-tuned sketchup model that has all the right layers, scenes etc and it has a corresponding Layout document and the two work well together to communicate how to manufacture a particular product (lets call it “Product_A”).
Now, I need to slightly modify the SKP file of Product_A to create Product_B.
I want to keep Product_A and its corresponding Layout document just the way they are but modify it to create Product_B, which is only slightly different. I would then like to update the Layout Document so it refers to Product_B (whilst retaining the Layout document for Product_A just the way it is) make the few notes and dimensions of changes to Product_B in Layout and now have two separate layout documents, referencing separate SKP files.
Make the changes to your SketchUp file and use Save as… to save it as ‘Product B.skp’.
Open the LayOut file and immediately use Save as… Change the name to save it as ‘Product B.layout’.
In Document Setup>References, select the original SKP file, choose Relink and select the Product B.skp.