On Apple's keyboards you have the option to use the function keys either as F-keys, or for the functions Apple has assigned them by default. When using the Apple-defined functions, you have the option ...
This Elytra keyboard from Elim forces the user to adopt a better typing postion and stops the hands crossing over by ...
I think you'll need a macro program like Quickeys to assign glyphs to a particular key arrangement. However you can "type" them using Character Viewer. Just go to Keyboard Preferences and turn it on ...