当前序言
我想用彩色横幅包裹文档的顶部，横跨整个页面宽度并延伸到文档的最顶部。这是我的序言和标题部分：
documentclass[a0, landscape]{a0poster}
\usepackage{multicol} % This is so we can have multiple columns of text side-by-side
\columnsep=100pt % This is the amount of white space between the columns in the poster
\columnseprule=0pt % This is the thickness of the black line between the columns in the poster
\usepackage[svgnames,dvipsnames]{xcolor}
\usepackage{color}
\usepackage{verbatim}
\usepackage{caption}
\usepackage[framemethod=TikZ]{mdframed}
\usepackage{float}
\usepackage{graphicx}
\graphicspath{{path}} % Location of the graphics files
\usepackage{booktabs}
\usepackage[font=small,labelfont=bf]{caption}
\usepackage{amsfonts, amsmath, amsthm, amssymb}
\begin{document}
%----------------------------------------------------------------------------------------
% POSTER HEADER
%----------------------------------------------------------------------------------------
% The header is divided into three boxes:
% The first is 55% wide and houses the title, subtitle, names and university/organization
% The second is 25% wide and houses contact information
% The third is 19% wide and houses a logo for your university/organization or a photo of you
% The widths of these boxes can be easily edited to accommodate your content as you see fit
\begin{minipage}[b]{0.55\linewidth}
\veryHuge \color{BrickRed} \textbf{Title of Poster} \color{Black}\\ % Title
\huge \textbf{Authors}\\ % Author(s)
\huge University\\ % University/organization
\end{minipage}
%
\begin{minipage}[b]{0.25\linewidth}
\color{DarkSlateGray}\Large \textbf{Contact Information:}\\
University \\
Address\\\\
Phone: (800)-999-9999\\
Email: [email protected]\\
\end{minipage}
%
\begin{minipage}[b]{0.19\linewidth}
\begin{flushright}
\includegraphics[width=20cm]{"/Users/hgducharme/Documents/School/Projects/Calculus II Honors/Poster Board/figures/logo"}
\end{flushright}
\end{minipage}
\vspace{1cm} % A bit of extra whitespace between the header and poster content
%----------------------------------------------------------------------------------------
首次尝试解决：
我尝试使用方法 #2关于同一问题的答案。在其他所有条件相同的情况下，我的代码更改为下面的块，结果是下面的图像。
%%% Packages %%%
\newcommand{\postertitle}[2] % Poster title
{
\begin{center}
\begin{tikzpicture}
\draw [purple,line width=0.2cm,rounded corners=0.2cm,fill=cyan] (-0.5\textwidth,-4)--
(-0.5\textwidth,4)--(0.5\textwidth,4)--(0.5\textwidth,-4)--cycle;
\draw (0,1)node[anchor=center,rotate=0]{\bfseries \sffamily \fontsize{43}
{0}\selectfont {}{#1}};
\draw (0,-2)node[anchor=center,rotate=0]{\bfseries \sffamily \fontsize{33}
{0}\selectfont {}{#2}};
\end{tikzpicture}
\end{center}
\vspace{0.015\textheight}
}
\begin{document}
%----------------------------------------------------------------------------------------
% POSTER HEADER
%----------------------------------------------------------------------------------------
\postertitle{
\begin{minipage}[b]{0.55\linewidth}
Title section
\end{minipage}
}
。
第二次尝试解决
我也尝试用彩色框包装该部分，但是也没有用。
\colorbox{Grey!70}{\parbox{\linewidth - 2\fboxsep}{%
%
\begin{minipage}[b]{0.55\linewidth}
Title Section
\end{minipage}
}}
。
在第二张图片中，我喜欢颜色框底部的结束位置。但是，我只想让它扩展页面长度，并让颜色框的顶部延伸到页面顶部。我该如何实现这一点？
提前感谢所有愿意提供帮助的人。
答案1
通过使用 tikzpicture（删除 showframe 以查看您想要的标题）：
\documentclass[a0, landscape]{a0poster}
\usepackage[margin={1cm,1cm}]{geometry}
\usepackage{mwe}
\usepackage{multicol} % This is so we can have multiple columns of text side-by-side
\columnsep=100pt % This is the amount of white space between the columns in the poster
\columnseprule=0pt % This is the thickness of the black line between the columns in the poster
\usepackage[svgnames,dvipsnames]{xcolor}
\usepackage{showframe}
\usepackage{color}
\usepackage{verbatim}
\usepackage{caption}
\usepackage[framemethod=TikZ]{mdframed}
\usepackage{float}
\usepackage{graphicx}
\graphicspath{{path}} % Location of the graphics files
\usepackage{booktabs}
\usepackage[font=small,labelfont=bf]{caption}
\usepackage{amsfonts, amsmath, amsthm, amssymb}
\usepackage{tikz}
\begin{document}
%----------------------------------------------------------------------------------------
% POSTER HEADER
%----------------------------------------------------------------------------------------
% The header is divided into three boxes:
% The first is 55% wide and houses the title, subtitle, names and university/organization
% The second is 25% wide and houses contact information
% The third is 19% wide and houses a logo for your university/organization or a photo of you
% The widths of these boxes can be easily edited to accommodate your content as you see fit
\begin{tikzpicture}[remember picture, overlay]
\node[rectangle, fill=cyan, anchor=north west, xshift=1cm, yshift=-1cm] at (current page.north west)
{
\begin{minipage}[b]{0.55\linewidth}
\veryHuge \color{BrickRed} \textbf{Title of Poster} \color{Black}\\ % Title
\huge \textbf{Authors}\\ % Author(s)
\huge University\\ % University/organization
\end{minipage}
%
\begin{minipage}[b]{0.25\linewidth}
\color{DarkSlateGray}\Large \textbf{Contact Information:}\\
University \\
Address\\\\
Phone: (800)-999-9999\\
Email: [email protected]\\
\end{minipage}
%
\begin{minipage}[b]{0.19\linewidth}
\begin{flushright}
% \includegraphics[width=20cm]{"/Users/hgducharme/Documents/School/Projects/Calculus II Honors/Poster Board/figures/logo"}
\includegraphics[width=20cm]{example-image}
\end{flushright}
\end{minipage}
};
\end{tikzpicture}
\vspace{1cm} % A bit of extra whitespace between the header and poster content
\end{document}
