Think you just missed it :)
I'm going to make a case for clarifying this in the BaseCamp Wiki. which at present just copies the help file on this item.
I would like to clarify that while the Garmin BaseCamp help file is the original source material for the wiki, the wiki already contains much more information than the help file, and most of the original text has been edited and refined, with many more revisions and updates planned.
It doesn't make it clear that the columns are only visible when the view is swapped, nor that the columns available vary by data type, some providing little extra info, others, like Routes, providing very useful ways of sorting.
Using the data view doesn't mean closing the map. You can resize the map to be as large as you like.
...the Basecamp UI effectively "hides" much of the really useful functionality...
Using the data view doesn't mean closing the map. You can resize the map to be as large as you like.