Make the compiler ignore \underline command

Question

I have the command \underline in several parts of my document. I would like to check how it looks without any underlining. But I don't want to recover all the instances of the \underline command in case I change my mind.

How can I achieve this? Instructing the compiler to ignore all instances of a command would work, I guess? But I don't know how to.

I use the Overleaf platform.

Answer 1

I suggest you run

\renewcommand\underline[1]{#1}

\documentclass{article}
\begin{document}
$\underline{abcde}$
\renewcommand\underline[1]{#1}
$\underline{abcde}$
\end{document}