Latex 作者脚标，通讯作者共同一作的问题

如何把通讯作者的信封标志也放在最下方？现在只知道如何把 * 放到最下方

\documentclass[runningheads]{elsarticle}
%

\setlength{\belowdisplayskip}{3pt}
\usepackage{ifthen}
\usepackage{comment}
\setcounter{secnumdepth}{4}


\usepackage{newtxtext,newtxmath} % optional: Times Roman clone text and math font

% for color models
\usepackage{xcolor}

% for nice coloring in tables
\usepackage{nicematrix}

% for multi-row cells
\usepackage{multirow}

%for Helvetica-like sans font
\usepackage[T1]{fontenc}
\usepackage{tgheros}
\usepackage{enumitem}
\usepackage{amsmath}
\usepackage[english]{babel}
\usepackage{amsmath}  

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[top=2cm,bottom=2cm,left=2cm,right=2cm,marginparwidth=1.75cm]{geometry}


\usepackage{marvosym}



\begin{document}
%

\begin{frontmatter}

\title{xxxx}

\cortext[coauthor]{Both authors contributed equally}
\renewcommand{\thefootnote}{\fnsymbol{footnote}}

\affiliation[inst1]{organization={United Kingdom}}


\author[inst1]{James\corref{coauthor}}
\author[inst1]{Henry\corref{coauthor}\textsuperscript{\Letter}}
\affiliation[inst2]{organization={United States}}

\begin{abstract}
\end{abstract}
\begin{keyword}
\end{keyword}
\end{frontmatter}
\end{document}

脚注？
\footnote``[number]{text}