I wish to produce the underscore ("_") character without any significant slowness from an unused function key. I'm intrigued by this answer provided by username Danny last year. If a modification of the code they wrote is possible for my needs, I'd be grateful for anything you can offer (I don't know code myself). I am not interested in fee-based software i.e. Keyboard Maestro if there's a way to do this natively or through shareware. Thanks in advance!
Edit: I should add, I'm using an external 104-key keyboard, and F16 is the key I'd like to configure to trigger the underscore. Thanks!