\usepackage{comment}
\@ifundefined {WhizzyTeX}{}{%
  \WhizzyInsideEnvironment {itemize}
     {\em \out@itemize}
     {\endout@itemize}
  \WhizzyInsideEnvironment {enumerate}
     {\em \out@enumerate}
     {\endout@enumerate}
  \let \latex@drawer \drawer
  \let \endlatex@drawer \enddrawer
  \renewenvironment {drawer}[1]%
     {\subsection {#1}\qquad
        {\emph{(Move cursor in subsection to open)}}\par 
      \setbox0\vbox \bgroup}
     {\egroup}
  \WhizzyInsideEnvironment {drawer}%
     {\latex@drawer}
     {\endlatex@drawer}
  \WhizzyInsideEnvironment {proof}
     {\@answer@laterfalse \out@proof}
     {\endout@proof}
  \expandafter \g@addto@macro \csname endnow-proof\endcsname 
    {\whizzy@envlimit@waux}
  \let \latex@mpr@and \mpr@and
  \def \mpr@and {\latex@mpr@and \whizzy@writelineno}
}