Comment 2 for bug 170546

Is this something you need to do a lot? There are many
features that would be useful but we wil never have room
enough for all of them.
Why not create a New Window and paste the selection there?

I would however be interested to see a way to break up a
document creating a seperate document for each Layer/group,
and going about it in a more general way might better solve
the task you are trying to perform.