# footnote won't show up in my document [duplicate]

This question already has an answer here:

I'm trying to add a footnote using \footnote{foobar}. But it won't show up in the footer of the document. I believe this is due to the fact that I manually changed the sizes of the layout of the document. Can anyone suggest a fix without changing the geometry of the layout. Here is the preamble to my .tex code

\documentclass[11pt]{article}
%\pagestyle{empty}

\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{textcomp}

\usepackage[parfill]{parskip}
\usepackage{booktabs}
\usepackage{fancyhdr}
\pagestyle{plain}

%the following code I think messes with footer width/height of the document.
\textheight=8.5in \textwidth=6.5in
\topmargin=-1in \oddsidemargin=0in

\begin{document}
\begin{tabular}{c c c c c }
\toprule
Course No. & Course title & Credits & Grade & Institution \\
\midrule
Math 644    & Real Variables & 5    & A & LLM \footnote{foobar} \\
Math 456    & Algebra I                 & 3 & A & LLM \\
\midrule
& Total Transfer Credits     &\fbox{18} &   &   \\
\bottomrule

\end{tabular}
\end{document}


Thanks in advance for all your help.