- The default copy-modein tmux vary from one to another operating system
- The emacs-modeset Start selection toC-Space, which always been used by OS as Switch Input Method between ...
- Add this line in the config file, i.e: ~/.tmux.conf:
 set-window-option -g mode-keys vi
- Reload tmux config file with either of thes ways:
- With tmux command, pressing Ctrl+B and then : to bring up a command prompt, and typing:
 :source-file ~/.tmux.conf
- Or simply from a shell:
 tmux source-file ~/.tmux.conf
 
- With tmux command, pressing Ctrl+B and then : to bring up a command prompt, and typing: