Not sure that I'm understanding you correctly, sorry if not.
If it's only for yourself, you just need to save it, then re-open it by double clicking it in the message list. If there is a way to reopen from the patient list, I have not found it.
If you are talking about handing a chart back and forth between users, like nurse to doctor then back to nurse, that is much more of a pain. Each person has to forward the chart to the person they think will be needing it next. You can always retrieve it if that person has not yet touched it. Otherwise, that person needs to forward it back to you. Leads to a lot of shouting down the hall, "hey, would you send Patient X's chart back to me" or messages in message box requesting same. The more expedient method is to share passwords, but that is a HIPAA no-no. Never-the-less, in small offices it is probably common.
