SuperKey is a utility program for the Commodore 64 computer that allows you to redefine up to 96 keys on your keyboard. You can redefine some or all of the keys, and add, change or delete any of the definitions
at any time. The keys that you can redefine are the graphics characters that are accessed by pressing and holding either the SHIFT or Commodore keys prior to pressing one of the graphics keys. Throughout the remainder of this manual the SHIFT and Commodore keys will be abbreviated SH and C=, respectively.

Thanks to Anthony for providing this documentation.  Although it's a scan of a photo copy, so far it's the only manual I've ever seen for this software and it's much appreciated.

Note - If anyone has this utility, I would love to add it to the site.