• Modifier keys
• What terminal keys look like
• How tmux describes keys with modifiers
• Limitations of Ctrl keys
• Limitations of Shift keys
• Limitations of UTF-8 keys
• The escape key
• Common function keys
• Modifiers and function keys
• Extended keys
• Why a key might not work
• Seeing what is sent for a key
• Troubleshooting steps
• tmux is not recognizing the key
• tmux is recognizing the key
• The number keypad