power.tex

\documentclass[crop, tikz, border=.1cm]{standalone}
\usetikzlibrary{positioning}
\usetikzlibrary{calc}
\usetikzlibrary{arrows.meta}
\begin{document}
\begin{tikzpicture}
    \newcommand\HighlightUpperKey{}
    \input{remarkable}
    \newcommand\radius{.15}

    \draw[annotation, ultra thick, {Latex[length=2.2mm]}-]
        (key-t.south) to [bend left=15] ++(-.2, -.6);
\end{tikzpicture}
\end{document}