# How can I minimize the distance between a symbol and a word above that?

I use the command \underset to write a symbol or word below of a symbol. For instance, $\underset{\mbox{iso}}{\cong}$, but the distance between them looks too big. How can I minimize that?

• Welcome to TeX.SX! Please help us help you and add a minimal working example (MWE) that illustrates your problem. Reproducing the problem and finding out what the issue is will be much easier when we see compilable code, starting with \documentclass{...} and ending with \end{document}. – Skillmon Mar 29 '18 at 10:21
• @Skillmon : thank you very much! And I will write the next question with the appropiate beginning and the end (I am sorry for this case). – joseabp91 Mar 29 '18 at 10:28

$\underset{\smash{\hbox{iso}}}{\cong}$