[Leon Starr]

I like to put the modification date in my documents, but I don't always want the variable to update. If I open a document just to look at it, something minor happens and then the modification date updates. But I don't want to use the creation date, because I want the modification date to update when I apply significant edits.

iWork apps handle this really well since they give you the option to update the modification date manually. I'm guessing that feature doesn't exist in OmniGraffle. Right?

Fall back plan, I suppose, is to convert the modification date to plain text whenever I do an update. Unless I am missing something (and I often do!) consider this a feature request.