Trouble with the showkeys package

Question

I am using showkeys package in LaTeX so my labels inside \[ \] math statements show up. Usually \[ \] does not show any numbering, I both want to use \[ \], and numbering, this was the only solution I could find.

In any case, with showkeys, the label numbers show up in little squares. Is there a way to change that square into parens, or maybe brackets?

Answer 1

If you want equation numbering use:

\begin{equation} 
    e = m c^2
\end{equation}

Using equation* (which requires amsmath package) instead will disable the equation numbering.

To adjust the appearance of the label from the showkeys, you can redefine the \showkeyslabelformat macro:

\renewcommand*\showkeyslabelformat[1]{\normalfont\small\ttfamily(#1)}