Draw margin boxes on page

Question

I'm trying to make sure the book has enough margin space for printing. The minimum margins are

Top: 0.5”
Bottom: 0.5”
Left: 0.5”
Right: 0.5”
Gutter: 0.3”

I don't want to use these margins for the book (most of the time, the margins I am using are much bigger than these), but I want to make sure I have at least this amount. Is there a way to draw a box around each page with the above dimensions, so that I can check to see if each page falls within the requirements? I am using

\documentclass[A4paper,10pt,openany]{book}
\usepackage[paperwidth=6in, paperheight=9in]{geometry} 

Thank you.

Answer 1

I used a partially transparent rectangle for the gutter. The red frame are your limits. The black frame is from geometry.

This takes two runs to work (remember picture stores the tikzpicture origin in the aux file).

\documentclass[twocolumn]{book}
\usepackage[paperwidth=6in, paperheight=9in,showframe]{geometry}
\usepackage{tikzpagenodes}
\usetikzlibrary{calc}
\usepackage{everypage}
\usepackage{lipsum}% MWE only

\newcommand\drawframe{\begin{tikzpicture}[remember picture,overlay]
    \draw[red] ($(current page.south west)+(0.5in,0.5in)$) rectangle ($(current page.north east)+(-0.5in,-0.5in)$);
    \draw[red, line width=0.3in, opacity=0.5] (current page text area.south)--(current page text area.north);
  \end{tikzpicture}}
\AddEverypageHook{\drawframe}% easier to debug separately

\begin{document}
\lipsum[1-10]
\end{document}