Extra space after equation with footnote

Question

So I need a footnote after an equation and I found this solution:

\documentclass{scrreprt}
\usepackage{mathtools}
\newtagform{fn}{(}{)\footnotemark}

\begin{document}
    \section{Example 1}
    \usetagform{fn} 
    \begin{equation}
    E=mc^2
    \end{equation}\footnotetext{Footnote}
    \usetagform{default}
    \section{Example 2}
\end{document}

However this adds extra spacing after the equation as shown in the picture below. How can I avoid this?

Answer 1

You can put the \footnotetext in a safer place, and avoid white space around the \usetagform

\documentclass{scrreprt}
\usepackage{mathtools}
\newtagform{fn}{(}{)\footnotemark}

\begin{document}
    \section{Example 1}
    \usetagform{fn} 
    \begin{equation}
    E=mc^2\footnotetext{Footnote}
    \end{equation}%
   \usetagform{default}%
    \section{Example 2}
\end{document}