\documentclass{article}
\usepackage{comment,enumitem}
%\usepackage{amsmath,comment,enumitem}
\usepackage[nocfg,screen,panelleft,sectionbreak%,orange%,paneltoc
]{pdfscreen}
\usepackage[showgrayletters]{exerquiz}
\margins{.65in}{.65in}{.65in}{.65in}
\screensize{6.25in}{9in}
\overlay{overlay1.pdf}
\changeoverlay
\paneloverlay{but.pdf}
\def\pfill{\vskip6pt}
\begin{comment} %Change of panel and background
\panelwidth=1.3in
\def\panel{\colorbox{blue!20}
{\begin{minipage}[t][\paperheight][b]{\panelwidth}