I think I have seen a thread in the past, but I couldn't find it when I search for it. At the moment I tend to use Evernote and include the full configuration URL and a screenshot of the graph, but this seems inefficient. What do other people use?

Basically this part of the wishlist:
- Archive library. Text file associated with each item
Snapshot HeaterMeter JSON config when archiving, for probe names and ability to reuse HM config
Date / Time, duration
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Upload a photo associated with it?
https://github.com/CapnBry/HeaterMeter/wiki/TODO