You beat me to it! Yes, this is the easy way to do this...especially if it is a very long chat session. Before you close out the chat window just click on the 3 horizontal bars (in upper left corner) and pick "save" (or however the option is labeled.) I do this quite often unless my topic is just really trivial. I don't know how much weight this would actually hold if you had to offer it up as "proof" of something said...but at least you'll have it.