\documentclass[]{article}%

\usepackage{gcheck}

\usepackage[a6paper,landscape,
  margin=1in,includeall]{geometry}
\geometry{right=2in,ignoremp}
\geometry{dvips,showframe}

\begin{document}

\typeout{}
\dcheck\paperwidth{423.94606pt}
\dcheck\paperheight{298.75394pt}
\dcheck\textwidth{207.13608pt}
\dcheck\textheight{87.21396pt}
\dcheck\oddsidemargin{0pt}
\dcheck\evensidemargin{0pt}
\dcheck\topmargin{0pt}
\dcheck\headheight{12pt}
\dcheck\headsep{25pt}
\dcheck\footskip{30pt}
\dcheck\marginparwidth{65pt}
\dcheck\marginparsep{11pt}
\dcheck\columnsep{10pt}
\dcheck\hoffset{0pt}
\dcheck\voffset{0pt}
\ccheck\mag{1000}
\checkresults
\typeout{}

\manyfoxes
\end{document}
