A fullscreen preview comprising a comparison result behaves the same way and offers the same options as any fullscreen preview (see “Fullscreen Preview” .)
The statusbar of the panel with the resulting image displays the title Comparison Result and the current zoom factor.
By default, the comparison result and the two previews of the compared assets are linked for all zooming, rotating and panning commands, i.e each zooming or panning operation in either panel is performed on the other two panels at the same time and in the same way (see “Linking Panels” ).
Comparison results can only be viewed, but not saved, rated, or labeled. And of course, there is no metadata for the comparison result to be displayed.
To get rid of the comparison result and possibly restore the preview image that was displayed previously in that panel, select the compare image, then open the context menu (with the right mouse button / Control key + mouse) and select Reset Compare Panel.
the right mouse button / 
Control key + mouse) and select Reset Compare Panel.