页面垂直居中规则

Question

更确切地说，我想要一个 18 × 26 cm² 的横向框，中间有一个规则。结合庄稼包装和此代码我有：

\documentclass{article}
\usepackage[paperwidth=18cm,paperheight=26cm]{geometry}
\usepackage[a4,frame,center,noinfo]{crop}

\begin{document}%
\thispagestyle{empty}%
\topskip0pt
\baselineskip0pt
\vspace*{\fill}%
\noindent\makebox[\linewidth]{\rule{\paperwidth}{0.4pt}}%
\vspace*{\fill}%
\end{document}

但正如您所见（我将尺寸缩小到 5 × 2 以便更明显），规则并不完全是一半。

我认为这是由于框的边距或规则的边距造成的。如何解决这个问题？

Answer 1

您必须为页面指定适当的边距。我已将边距设置为0in。

\documentclass{article}
\usepackage[paperwidth=18cm,paperheight=26cm,margin=0in]{geometry} %% specify equal margin
%\usepackage[a4,frame,center,noinfo]{crop} %% not needed
\usepackage{tikz}

\begin{document}%
\thispagestyle{empty}%
\topskip0pt
\baselineskip0pt
\vspace*{\fill}%
\noindent\makebox[\linewidth]{\rule{\paperwidth}{0.4pt}}%
\vspace*{\fill}%

%% to confirm the center
\begin{tikzpicture}[remember picture,overlay]
  \node[scale=3,text=red] at (current page.center) {X};
\end{tikzpicture}
\end{document}

红色X只是为了显示中心。为了更安全，您可以将和headheight设置为零。您可以在headsepfootskip

\usepackage[paperwidth=18cm,paperheight=26cm,margin=0in,headheight=0in,headsep=0in,footskip=0in]{geometry}

一个tikz办法：

\documentclass{article}
\usepackage[paperwidth=18cm,paperheight=26cm,margin=0in]{geometry} %% specify equal margin
%\usepackage[a4,frame,center,noinfo]{crop} %% not needed
\usepackage{tikz}

\begin{document}%
\begin{tikzpicture}[remember picture,overlay]
  \draw[olive, line width=8pt] (current page.south west) rectangle (current page.north east);
  \draw[red, line width=0.4pt](current page.west) -- (current page.east);
  \node[scale=3,text=red] at (current page.center) {X};   %%% uncomment just for demo
\end{tikzpicture}
\end{document}