https://forum.nasaspaceflight.com/index.php?topic=63178.msg2719260#msg2719260OK, since this thread is apparently aimed at how to reference texts, it triggers a question that has been in my mind for years but has just lingered there. If someone deletes a message (originator, moderator, whoever), does the message number of all succeeding messages become renumbered such that there is no gap in messages numbers or is a gap list. Same question when someone (moderator or otherwise) moves a number of posts to a different thread. For what it is worth, my experience is each time the reader moves to the next page, the first message number is a multiple of twenty (20). Alternative: is it just better to quote the item of interest? (Not necessarily important, but I know I have messed up on posts by tryng to quote and getting strange results. For now, lets just write that off to inexperience -- should I instead post more often -- that is a rhethorical question.) Once upon a time, on a different website, I remember being discouraged to reference reply numbers when responding/participating in a discussion. BTW, I am skipping the "preview" step because, perhaps due to my own incompetence, I have not obtained favorable results. Be that as it may. Could just be me