On Tue, 5 Dec 2017 07:20:43 -0700 compdoc <compdoc at hotrodpc.com> wrote: > > I was wondering if you opened the Displays app, if you see more than > one monitor? > Aha. Thank you. I looked and it seemed that my display wasn't registered as the primary display. Making it the primary display brought the panels back. Many thanks. - Richard