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This question already has an answer here:

I think it would be beneficial if in our profile, we had the option to define some MathJax shortcuts, much like how we define LaTeX shortcuts in the headers of our LaTeX-Documents. This would save users time in writing answers.

For example, I would like to save shortcuts similar to these for my account, so I don't have to waste time typing:

\newcommand{\R}{\mathbb{R}}
\newcommand{\Z}{\mathbb{Z}}
\newcommand{\N}{\mathbb{N}}

I think this would be reasonably easy to implement, and it should be welcomed esp. by our more dedicated users.

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marked as duplicate by Grigory M, Davide Giraudo, Henning Makholm, Asaf Karagila, hardmath Dec 23 '13 at 15:37

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • $\begingroup$ Alternatively, if there were a foreseen problem with saving JaX shortcuts to an account, as accounts occasionally get deleted while the posts stay behind, being able to paste your own \newcommand set in header would be nifty. $\endgroup$ – J. W. Perry Dec 21 '13 at 4:40
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    $\begingroup$ @J.W.Perry That problem would be resolved if the MathJax script simply converts your macro to 'normal MathJax' upon posting. I think there are many ways to easily resolve that issue. $\endgroup$ – Newb Dec 21 '13 at 4:42
  • $\begingroup$ Ahh quite so! That would be nifty squared. $\endgroup$ – J. W. Perry Dec 21 '13 at 4:43
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  • $\begingroup$ If this isn't possible, I'd like to note that it's more convenient sometimes to simply write \Bbb Z, say, for $\Bbb Z$. Shorter and no need for brackets. $\endgroup$ – user98602 Dec 21 '13 at 5:01
  • $\begingroup$ I like this suggestion, since it neatly addresses those issues I felt were problems with previous similar proposals. I wonder if it might not be possible to do something like this user-side (via for example a browser extension or similar). $\endgroup$ – Tobias Kildetoft Dec 21 '13 at 11:57
  • $\begingroup$ @TobiasKildetoft Well, I think that should be easy. If you would have a browser plugin that would allow you to 'replace all' (just like in for instance Microsoft Word) so that you could replace all occurences of for instance '\z' by '\mathbb{z}' that would be just as efficient as the suggestion in the OP. $\endgroup$ – dreamer Dec 21 '13 at 13:02
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    $\begingroup$ These could be useful for that purpose. For Firefox: addons.mozilla.org/en-US/firefox/addon/foxreplace and for Chrome: chrome.google.com/webstore/detail/search-and-replace/… $\endgroup$ – dreamer Dec 21 '13 at 13:04
  • $\begingroup$ @901301 those are pretty useful, thanks $\endgroup$ – Newb Dec 22 '13 at 3:40
  • $\begingroup$ Another possibility is to edit your OS keyboard shortcuts, for example: CTRL+z displays: \Bbb Z $\endgroup$ – user93957 Dec 23 '13 at 19:51
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This could be implemented by turning on the begingroup extension in MathJax.

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