I searched before I posted this, I really did!

Is there a way to edit Description 2 in the GL?
I am frequently looking into an entry to clarify what it's all about, but then there's no way to append the record with the new information. I'd love to be able to just pop my findings into Description 2 so that in a year when I'm looking at the same transaction wondering what it's about I'd have a reminder instead of having to start from scratch...
Obviously not looking to change numbers or dates or anything that would damage the guts of the system, just pop a note somewhere into a GL entry.
Is there anything like that? Andrew, is there 'a module for that'?
Thanks!