% !TeX program = lualatex
% This filename = jiffy-example.tex
\documentclass[11pt]{book}
\setlength{\paperwidth}{8.5in}      % 1W
\setlength{\paperheight}{11.0in}    % 1H
\setlength{\oddsidemargin}{-0.125in}% 4W
\setlength{\evensidemargin}{0.125in}% 3W
\setlength{\topmargin}{-0.50in}     % 3H
\setlength{\headheight}{0.25in}     % 5H
\setlength{\headsep}{0.25in}        % 6H
\setlength{\footskip}{0.50in}       % 7H
\setlength{\textwidth}{6.5in}       % 2W
\setlength{\textheight}{8.75in}     % 2H
\setlength{\marginparsep}{0.0625in} % 6W
\setlength{\marginparwidth}{1.0in}  % 5W
\usepackage[
  pt_precision=1, % fullpage,
  display-language=english-us % dutch, english-us, french, german, spanish, vietnamese
]{jiffy}
\begin{document}
\jiffy
\end{document}