# how to make the grid within eso-pic in a A3 poster less visible

I am making a A3 poster that has a square grid as background. I would place more texts and pictures on this poster using textpos package. My question is 1) as in the title: that is making texts and graphics more visible on top of this background and 2) is it the right way to make A3 poster?

\documentclass[a3,portrait]{a0poster}
\usepackage[svgnames]{xcolor}
\usepackage[utf8]{vietnam}
\usepackage{graphicx} % Required for including images
\graphicspath{{figures/}} % Location of the graphics files
\usepackage{booktabs} % Top and bottom rules for table
\usepackage[font=small,labelfont=bf]{caption} % Required for specifying captions to tables and figures
\usepackage{amsfonts, amsmath, amsthm, amssymb} % For math fonts, symbols and environments
\usepackage{wrapfig} % Allows wrapping text around tables and figures
\usepackage{tikz}
%\usepackage[colorgrid,texcoord]{eso-pic}
\usepackage[texcoord=false,grid,gridunit=mm,gridcolor=gray!40,subgridcolor=green!40]{eso-pic}

\usepackage[absolute,overlay]{textpos}
\begin{document}
\begin{textblock}{20.5}(1.5, .5)
HỘI TOÁN HỌC VIỆT NAM

KỲ THI TÌM KIẾM TÀI NĂNG TOÁN HỌC TRẺ
\end{textblock}

\includegraphics[width=22cm]{ztuong}

\begin{textblock}{20.5}(11.5, 2.5)
Some text
\end{textblock}
\end{document}


1. I'd suggest placing the grid in the background rather than over top of the content (in the foreground). To achieve this, add the option gridBG as part of the options you already specify.

In order make the grid even less visible, use colours that are closer to white. So, instead of (say)

gridcolor=gray!40,subgridcolor=green!40


you could use (say)

gridcolor=gray!5,subgridcolor=green!5


\documentclass[a3,portrait]{a0poster}
\usepackage[svgnames]{xcolor}
\usepackage{graphicx} % Required for including images
\usepackage[
texcoord=false,
grid, gridBG,
gridunit=mm,
gridcolor=gray!5, subgridcolor=green!5]{eso-pic}
\usepackage[absolute,overlay]{textpos}
\begin{document}

\begin{textblock}{20.5}(1.5, .5)
Here is some regular text.

And then some more regular text.
\end{textblock}

\includegraphics[width=22cm]{example-image}

\begin{textblock}{20.5}(11.5, 2.5)
Some text
\end{textblock}

\end{document}

2. This depends heavily on what you want to achieve. If you poster content has a document-like feel to it, then no. If would be easier to set a regular document that you insert on an A3 page. However, if you have abstract blocks containing images, with an arbitrary layout, then this option would work.

• If \pagecolor{blue} is used, then the grid by the eso-pic will not be displayed. How can I use both? – Thumbolt Mar 2 '16 at 2:00
• @Thumbolt: Use \pagecolor{<colour>} in the preamble. – Werner Mar 2 '16 at 2:35