In response to this question on using a conditional to define a TikZ style it was suggested to use /utils/exec.

It is easy to find uses of this, but I have not been able to locate documentation on it. I have looked in the TeXbook and TeX By Topic, but did not find this.

So, where what exactly is /utils/exec and where can I find documentation on it. Under what conditions should one use this or not use this?

  • 2
    See Section 55.4.8 Handlers for Key Inspection of the pgfmanual. May 9, 2011 at 23:30
  • @Gonzalo: Could you make that an answer.
    – Joseph Wright
    May 10, 2011 at 7:02
  • It is a PGF/TikZ style so it is of course in the pgfmanual. You wont find such things in the TeXBook or in TeX By Topic, they list only plainTeX macros but not (La)TeX packages. May 10, 2011 at 7:28
  • I didn't realize it was a PGF/TikZ style and hence it wasn't obvious to me where to look. Hopefully this will be of help to someone else. May 10, 2011 at 8:09

1 Answer 1


It is implemented by PGF/TikZ; see Section 82.4.8 Handlers for Key Inspection of the pgfmanual.

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