In this SE question, Inheriting Stylesheets when using CreateDocument, I noticed the literal string argument "Output" to Column. I didn't see any documentation for this argument (see below), and I didn't see any effect of the argument:
and was curious what it does or doesn't do, or what it's supposed to do.
Silent documentation:




Column[{{1, 2, 3}, {3, 4, 5}}, "Harry"]or `Column[{{1, 2, 3}, {3, 4, 5}}, "Reb.Cabin"]'. $\endgroup$