If you’re using tmux primarily for screen splitting, then the only commands you really need are these:
- Ctrl-B % for a vertical split (one shell on the left, one shell on the right)
- Ctrl-B " for a horizontal split (one shell at the top, one shell at the bottom)
- Ctrl-B O to make the other shell active
- Ctrl-B ? for help
- Ctrl-B d detach from Tmux, leaving it running in the background (use tmux attach to reenter)