%%% Bogus\l{}aw Jackowski: \local \par ameters
% Macro \local changes a value of a parameter locally
% (for one paragraph)

\let\restoreparams\empty
\def\local#1{% 
 \ifx\restoreparams\empty
  \let\oripar\par
  \def\par{\oripar \restoreparams \let\par\oripar \let\restoreparams\empty}%
 \fi
 \edef\restoreparams{\restoreparams#1\the#1}%
 #1}

% example

\local\hfuzz=2pt
\local\hsize=2in
\local\leftskip=1in
\local\parindent=0pt
Some paragraph that is to be different than others.
\par

Some normal paragraph.