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In addition to the Escape key, I would like to go into Normal mode while editing by pressing the caps-lock key. How do I achieve that?
Thus far I have been able to disable the Caps-lock key using https://www.cyberciti.biz/faq/linux-deactivate-caps-lock/
specifically with the command setxkbmap -option ctrl:nocaps as mentioned on that website.
Emacs does not allow treating the capslock key specially. Generally, treating modifiers specially is something supported differently well, depending on the frontend in use (the X one supports the standard modifiers, so does the Cocoa one).
What you could do instead is remapping the capslock key to a different key Emacs recognizes (such as F13), then bind that key to your desired action in Emacs.
