In How can I get the Full Cygwin Installation (about 1GB)?, Bibhas's answer gives detail and helpful screenshot for what the Cygwin installer's UI was for years.
That installer behavior has changed; the UI works differently, and I may have figured out how to request a full install be downloaded, but I'm not positive.
What is the preferred way to do a Cygwin full install given the installer's new UI?
Thanks,
--UPDATE--
Per comment, this is a screenshot of what I was getting initially, which was unfamiliar to me.