If you use Mail to print membership cards, the status of the cards will be changed from "not printed" to "printed."
If for any reason these cards need to be reprinted (e.g. a mistake was made), you currently have to go into each record individually to change the print status to "not-printed" to accomplish the re-print, since Mail will only print those cards that have a "not printed" status.
You can do change so many other fields in a global manner, it would be nice to be able to do so with this print status field, too.