I'd like to propose this change simply because when I was first attempting to get tmux up and running I thought what I was supposed to be typing was "synchronize-panes: " then hitting ctrl+b and shift and :. I've never used tmux, although have used screen before so once I realized they were essentially the same thing I felt much more comfortable with everything, but while trying to get going with the tutorial it felt bad failing at something before I even started. It proves to be invaluable later on in the tutorial so I would hate for someone else to go through the same thing. I was thinking maybe an image of how the screen changes and what it looks like when you've successfully completed the steps might be helpful. Something like : https://photos.app.goo.gl/buC41xzCEcQeDqSR8
The "shift+:" change I'm a little less committed to; my thinking here was that it didn't register in my head as a key sequence and looked more like something I was supposed to write out.
mikenadal