[Tex/LaTex] Partially transparent text box

beamerboxesposterstransparency

I am trying to make a poster using beamer. Can any one please reply me, my question is:

How can I make my boxes partially transparent so that my background will be visible through the boxes?

Best Answer

The following was taken verbatim from the PGF documentation (section 20 Transparency, p 234):

enter image description here

\documentclass{article}
\usepackage{tikz}% http://ctan.org/pkg/tikz
\begin{document}
\begin{tikzpicture}[every node/.style={fill,draw}]
  \draw[line width=2mm,blue!50,line cap=round] (0,0) grid (3,2);
  \node[opacity=0.5] at (1.5,2) {Upper node};
  \node[draw opacity=0.8,fill opacity=0.2,text opacity=1]
    at (1.5,0) {Lower node};
\end{tikzpicture}
\end{document}

It translates directly to beamer.

Related Solutions

[Tex/LaTex] Techniques for embedding images with transparent backgrounds in LaTeX

Your Google source is wrong. The PDF version of LaTeX pdflatex supports the PNG format out of the box, including transparent PNGs. If you have your logo in another format like GIF than simply convert it to PNG first. I would not recommend to use the normal latex compiler with DVI output.

You need the standard package graphicx to include the image. Loaded xcolor would also be a good idea. Here some examples which use a transparent test PNG I got from http://entropymine.com/jason/testbed/pngtrans/rgba16.png.

\documentclass{article}

\usepackage{xcolor}
\usepackage{graphicx}

\begin{document}

\framebox{\includegraphics{rgba16.png}}
\colorbox{red}{\includegraphics{rgba16.png}}
\colorbox{white}{\includegraphics{rgba16.png}}
\colorbox{yellow}{\includegraphics{rgba16.png}}

\end{document}

The first image shown is the original transparent PNG. As you can see the other work fine with some background color.

Result 1

For advanced effects like patterns and shadings I would recommend you PGF/TikZ (i.e. the tikz package).

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{patterns}

\begin{document}
\begin{tikzpicture}
    \node [pattern=north east lines,inner sep=10pt] {\includegraphics{rgba16.png}};
\end{tikzpicture}
\begin{tikzpicture}
    \node [shade,left color=yellow,right color=blue,inner sep=10pt] {\includegraphics{rgba16.png}};
\end{tikzpicture}
\end{document}

Result 2

[Tex/LaTex] Transparent background for mdframed environment

You must set the opacity to the whole environment.

\documentclass{article}
\usepackage{tikz}
\usepackage[framemethod=tikz]{mdframed}
\usepackage{lipsum}
\usepackage{background}
\SetBgContents{top secret}
\SetBgColor{red}
%  \tikzset{mdfbackground/.style={fill=red,opacity=0.1,draw=green}}%
\newmdenv[tikzsetting={draw=blue,fill=red,},settings={\tikzset{every picture/.style={opacity=0.6}}}]{myenvironment}
\begin{document}
\BgThispage

\begin{tikzpicture}
\draw[blue,fill] (0,0) rectangle (8,4);
\node[text width=8cm] {\lipsum[1]};
\end{tikzpicture}

\begin{myenvironment}
\lipsum[1]
\end{myenvironment}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Techniques for embedding images with transparent backgrounds in LaTeX

[Tex/LaTex] Transparent background for mdframed environment

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