A very, very, very common data management workflow is to have two Arc Catalog instances going and be looking at metadata for one item in one instance, and metadata for another in the other instance. This is very handy when you manage tens of thousands of datasets and need to get to the right one. In Pro, not so efficient.....Turn on "Show Details Panel" in the default, docked catalog view. Add another catalog view and undock it. Note how when you select an item in either catalog view, the metadata of the item you previously selected in the other catalog view is turned off.