Quote - Do you see the small gray docking square in the upper right corner, just under the X to close? Click that square, and choose "Floating." Does that fix it?

 

No but I figured it out. In preferences, set libray to open externally instead of embedded.

 

Thanks for your quick reply.

So far it looks good. Deleting items from a scene no longer results in an age long wait for the scene to refresh. Same after rendering, no long wait for the preview after you click the preview tab. I often had to wait a couple of minutes for the preview to reappear.