# Labelling terms in an equation without using \underbrace

How can I create the descriptors below or above equation terms without displaying the actual underbrace or overbrace?

• Welcome to TeX SX! Could you post a full compilable code? Sep 25 '18 at 23:35

Is it something like this you want?

 \documentclass[a4paper, 11pt]{book}
\usepackage[utf8]{inputenc}

\usepackage{mathtools}
\usepackage[usestackEOL]{stackengine}

\begin{document}

$U' = \underbracket[0pt]{k_1 U}_{\scriptsize\shortstack{uptake\\ of U }} +\underbracket[0pt]{ k_4U(U_0-U)}_{\scriptsize\shortstack{U-dependent\\ biosynthesis of U}} +\underbracket[0pt]{k_5\frac{p_1}{p_1 + U}}_{\scriptsize\shortstack{conversion\\ from  E\to U }}$

\end{document}


• Thank you kindly, it's exactly what I was looking for! :-) Sep 26 '18 at 0:41