Is it possible to add a "Drafts" folder to the PMing feature?

1. ctrl+a
2. ctrl+c

Why would you possibly need a drafts folder?

Umm...what does ctrl+a and ctrl+c do exactly?

Sometimes I type up a message but can't send it right away or want to save it and send it at a later time, so I wanted to know if it could be done.

ctrl+a = select all text
ctrl+c = copy selected text
then do a
ctrl+v to paste it in a spot where you can save it for later usage ._.