set font in latex

setfont.tex

\usetheme{default}
\usepackage{mathpazo}
\usepackage{fontspec}
\setbeamertemplate{background canvas}{\includegraphics [width=\paperwidth]{blackboard_bk.pdf}}
\newfontfamily\chalkd{Chalkduster.ttf}
\newfontfamily\chalkb{Chalkboard.ttc}

\setbeamerfont*{normal text}{family = \chalkd}
\setbeamerfont{alerted text}{family = \chalkd}
\setbeamerfont{structure}{family = \chalkd}
\setbeamerfont{title}{family = \chalkd, size = \Huge}

\setbeamercolor{normal text}{fg=white}
\setbeamercolor{alerted text}{fg=yellow!80}
\setbeamercolor{structure}{fg=yellow!80}
\setbeamercolor{frametitle}{fg=white}
\setbeamercolor{title}{fg=white}
\setbeamertemplate{blocks}[shadow=false]
\setbeamercolor{block body}{fg=normal text.bg!90!black}
\setbeamercolor{block body example}{bg=normal text.bg!90!black}


\setsansfont{Chalkduster.ttf}
%\setmonofont{Chalkduster.ttf}