Shift+Enter: bug or feature?
I noticed that in the beta version, shift+enter will open an entry from a list in a new pdf viewer window, rather than a new tab. But there is no documentation of this feature, option to merge it back into a tab, or to drag a tab out, so I wonder if this a bug? If it's a bug then it is a useful bug, as I often need to compare two files side by side.
The ability to drag tabs into or out of the tag bar is an unrelated, much more advanced feature that hasn't been implemented.