I have hunted around for the content type for "Checkin Comments" because we have
had a request that we make this a required piece of information. I have no idea
if this is even possible, but with the work that we do, requiring this
information would make it a little easier to know what had changed between
versions of documents, and our users don't always enter anything into this
field. I may not be able to make them add something useful, but I would at
least like to require them to add something. Has anyone ever figured this out?