== Details ==
Allow an authenticated user (with Issue Manager permission?) to advanced
the displayed issue to the "Next Issue" for their session.

There are three scripts that would need a slight modification and a
session variable that could be referenced on the public site from
inside the Site Administration panel. WordPress, before version 2.1
(or thereabouts), would load a preview inside an <iframe>. Now it
simply adds a query string to the end (?preview=true) and a check to
see if the user is logged in. Meeting those two checks, it shows the
post.

Our problem, on the other hand, follows a different path. By default,
PacerCMS is unkind to those that would try to view an unpublished
(date greater than the current_issue). We do this to give control over
what is widely available. The simple solution might be to have the
current_issue set to match the next_issue if a request has been made
to put it into preview mode (via a session key). We would have to
develop a way for logged in users to swap back and forth between the
two, and any changes to the publish settings (moving the next issue to
the current issue) would need to unset the key and return it back to
normal mode.