Google and forum search did not lead me to anything.  Maybe I don't know the right term to search for so here goes...

I have drawings that I need to keep confidential (internal / vendor only), some that only certain customers have access to, and some that can be distributed publicly.

Most of you surely have similar classifications at your companies.

Do any of you fine forum folks mark this classification / confidentiality / allowable distribution on the drawings somehow?

Please share.. I would love to see exactly how some of your systems work.  Thanks!!