How do I enter keystrokes in a pretty printed form?

For example, the keyboard combination CTRL-SHIFT-D in this answer was pretty printed as



The html tag to produce the any key is


Just to clarify:
Stackexchange sites use an extended version of markdown and allows a certain subset of standard html tags. These tags work in questions, answers and tag wikis. Some stackexchange sites (including the Mathematica one) also allow for LaTeX via MathJax (you can thank the guys at mathoverflow for getting this working first).

The comments only allow a small subset of markdown and AFAIK none of the html tags. See the end of this meta.SO answer.

For examples of some more extreme uses of the allowed markdown, see the meta.SO sandbox

  • I have to try it: <kbd>test</kbd>. – István Zachar Jan 19 '12 at 15:36
  • It seems that it does not work on my end. – István Zachar Jan 19 '12 at 17:58
  • It might only work in an answer field? – Eli Lansey Jan 19 '12 at 20:56
  • 2
    @IstvánZachar: as noted in the recent edit of this answer, only a limited subset of markup works in comments. – Isaac Jan 20 '12 at 2:51
  • Thanks Isaac, I read it as well. – István Zachar Jan 20 '12 at 9:07

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