It was like pulling teeth to figure out a way to clear the screen in tmux, such as CMD+K does in Terminal.app and iTerm. Add this line to your tmux.conf. It Just Works™:

bind -n C-k send-keys -R \; send-keys C-l \; clear-history

Since switching to vim, I’ve found myself really enjoying keyboard-based user interfaces. So instead of managing multiple terminal sessions in iTerm, I have started using tmux. I’m writing this cheat sheet as I learn. Check back often.