[%# modkey: typeset a modifier/key sequence
  # ARGS:
  #     key    : modifier key (control alt shift return)
  #     key2   : 2nd modifier key (control alt shift return)
  #     letter : letter from the keyboard
-%]
\keystroke{[%- key | ucfirst -%]}[%- IF key2 -%]-\keystroke{[%- key2 | ucfirst -%]}[%- END -%][%- IF letter -%]-\keystroke{[%letter%]}[%- END -%]

