When Okular is setup to open new documents as tabs in the running Okular instance, it is not possible to open up new okular for side-by-side view. I have this setting because most of the time this is what I need so I don't have multiple windows floating around, easier to navigate, but time to time (typically when connecting a big monitor) it would be nice to see multiple documents.

Both the solution available in browsers (when one can tear a tab off the application) or a dedicated right click menu entry seems like a good idea (right click, "Broke out document to new window").

Thanks for looking into it