TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm currently trying to write over/under an implies arrow in LaTeX (in math mode):


This places the text lower, but next to the arrow, not below it. How can I get it below the arrow?

share|improve this question
Related question: tex.stackexchange.com/questions/4813/extendible-equals-sign if you're willing to load amsmath then I strongly expect that the answer to your question will be very similar to the accepted answer to that question. – Loop Space Nov 9 '10 at 19:21
Already running amsmath, sorry. – Femaref Nov 9 '10 at 19:25
That you are already running amsmath is a good thing, not a bad one! – Loop Space Nov 9 '10 at 19:45
the "sorry" wasn't for running amsmath, but not providing the detail in the question ;) – Femaref Nov 9 '10 at 20:04
up vote 16 down vote accepted

You can use \xRightarrow[below]{above} from the mathtools (or extpfeil) package or \xLongrightarrow[below]{above} from extarrows. (Have a look at “How to look up a math symbol?” for ideas how you can easily find a particular symbol.)

If you want to keep the the same arrow length as implies, you can use \underset and \overset from amsmath, e.g. \underset{below}{\implies}, or maybe \underset{\mathclap{below}}{\implies} (\mathclap makes it so that “below” doesn’t introduce extra vertical space if it is longer than the arrow. It is included in the immensely useful mathtools package).

share|improve this answer
Sadly, the proposed arrow looks different than the implies arrow, so it wouldn't fit with the rest of the equations :/ thanks for your help though. – Femaref Nov 9 '10 at 19:35
@femaref Except for the length they look exactly the same on my system. Do you want the length to stay constant? – Caramdir Nov 9 '10 at 19:39
the second thing helped me. For you, comparision of the two arrows: abload.de/img/arrows_zoomednbxj.png and abload.de/img/arrowsrbfs.png – Femaref Nov 9 '10 at 19:49
\underset FTW. And I need to learn more about mathtools. – Matthew Leingang Nov 9 '10 at 19:56
@Femaref: You are using 12pt, aren't you? You might want to have a look at this question if you want the arrows look better. – Hendrik Vogt Nov 9 '10 at 21:33

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.