Turn off Spotlight/search results by file size

With a recent OSX update, my search results default to listed by file size grouping and I can't seem to find a way to turn it off. Any ideas on how to change it back so the 'date last opened" actually lists the date last opened first?

Apple is slipping. This stuff is such a monumental waste of time. With nearly every recent update I've had to reindex HDs to get search results to work properly. Search ... the most basic of computer functions. :-/

[Edited by Moderator]