Such a window might be called the "Preview" or "Viewfinder" window. It should stay open until the user closes it, even if MDA is run (which should use a separate window).
It is okay that the Snap button stops any ongoing Live (as it currently does). Starting MDA can (should) also stop any ongoing Live.
And if ndv can (be made to?) allow insertion of custom widgets, it would be nice to have Snap and Live buttons inside the Viewfinder window, just for easy access.
Such a window might be called the "Preview" or "Viewfinder" window. It should stay open until the user closes it, even if MDA is run (which should use a separate window).
It is okay that the Snap button stops any ongoing Live (as it currently does). Starting MDA can (should) also stop any ongoing Live.