bb,
I believe my use of paint for garden record started by scanning an old pencil and paper sketch into computer and wanting to mark something on it. I noted how paint could provide an on-going changeable record then and subsequently erased the written info and replaced it w/ type. I have used paint therefor ever since. When I open it, it actually overfills the screen (& I've a pretty good sized screen).
I'm hoping to find the time this winter to write up an article on how I so employ paint.