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I often find when programming with LabVIEW that I don't have room on my block diagram for free label documentation. I find it hard enough trying to keep clean and tidy code and even harder document it well. Free labels take up lots of room and I end up not writing good documentation because I don't have room for it.
My solution to this problem is a Documentation Node where you can write comments in a free label, minimize it and use context help to read it in the future.