If you want to rework an an object you have created within a larger scene, it can be easier to save that object into its own file, edit it and import the file into your scene.
To save an object in your scene into its own file:
One way is to save the scene as a new file with a different filename then delete all the other objects in your original scene and save the new scene (containing the isolated object) with a new name.
Another way is to select and cut the object you want to isolate (choose Edit > Cut), save the file before closing so that it doesn't include the isolated object, open a new file (choose File > New), paste the isolated object into the new scene (choose Edit > Paste), and save the file with a new name.
Once you have finished working on the object, you can cut and paste it into the original scene, import it (File > Import) , or import it as an inline (File > Import As Inline).
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