Explaining the different tmux modes
tmux actually has a few different modes that can be used when interacting with it, such as Default mode and Copy mode. If you're a vi user, these modes are very similar to vi's insert and normal modes:
Default mode: This is what we've seen thus far while interacting with tmux, which is mostly just giving us an interface atop the programs in the underlying window. This is similar to vi's insert mode. You are in Default mode by default, and if you go into any other mode and then exit it, you'll end up back in Default mode.
Copy mode: This allows us to access the Window history and copy/paste contents from that history. It is similar to vi's normal mode in that it allows you to move around without tinkering with the underlying programs, just like vi's normal mode allows you to move around without altering the underlying document. It can be accessed by <Prefix>, [.
Command mode: This mode is used to enter arbitrary tmux commands. It is similar to the...
