diff --git a/common/modules/prelude-toc.org b/common/modules/prelude-toc.org
index 9df83cd..95f5a90 100644
--- a/common/modules/prelude-toc.org
+++ b/common/modules/prelude-toc.org
@@ -1,98 +1,103 @@
 #+BEAMER_HEADER: \titlegraphic{\includegraphics[width=\extblockscale{0.7\textwidth}]{SWH-logo+motto}}
 
 #+STARTUP: hidestars
 # activate org-beamer-mode minor mode automatically
 #+STARTUP: beamer
 
 # org export options
 #+LANGUAGE:  en
 #+OPTIONS:   H:2 num:t toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
 #+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+LINK_UP:
 #+LINK_HOME:
 #+LaTeX_CLASS: beamer
 #+LaTeX_CLASS_OPTIONS: [presentation,xcolor=table]
 
 #
 # important font choice!
 #
 #+LaTeX_HEADER: \usepackage{libertine}
 
 #
 # Let's move that logo...
 #
 #+LaTeX_HEADER: \usepackage{animate}
 
 #+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
 
 # have the theme desired
 #+latex_header: \mode<presentation>{\usetheme{swh} \beamertemplatenavigationsymbolsempty \setbeamertemplate{navigation symbols}{} \setbeamertemplate{headline}{}
 #+latex_header: \setbeamertemplate{footline}
 #+latex_header: {
 #+latex_header:   \leavevmode%
 #+latex_header:   \hbox{%
 #+latex_header:   \begin{beamercolorbox}[wd=.5\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
 #+latex_header:     \usebeamerfont{author in head/foot}\insertshortauthor%~~\beamer@ifempty{\insertshortinstitute}{}{(\insertshortinstitute)}
 #+latex_header:   \end{beamercolorbox}%
 #+latex_header:   \begin{beamercolorbox}[wd=.5\paperwidth,ht=2.25ex,dp=1ex,right]{title in head/foot}%
 #+latex_header:     \usebeamerfont{title in head/foot}\insertshorttitle{}\hspace*{2em}
 #+latex_header:     \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
 #+latex_header:     \insertframenumber{} / \inserttotalframenumber\hspace*{2ex} 
 #+latex_header:   \end{beamercolorbox}}%
 #+latex_header:   \vskip0pt%
 #+latex_header: }
 #+latex_header: }
 
 # some color
 #+latex_header: \rowcolors[]{1}{blue!10}{blue!05}
 
 #
 # to have a toc for each section
 #
 # Use suggestions from http://web.stanford.edu/~dgleich/notebook/2009/05/appendix_slides_in_beamer_cont_1.html to avoid counting tocs in page number
 #
 #+latex_header: \AtBeginSection[] {\begin{frame}<*> \frametitle{Outline} \tableofcontents[currentsection]\end{frame} \addtocounter{framenumber}{-1}}
 
 # set the paths for images
 #+latex_header: \graphicspath{%
 #+latex_header:               {../../common/images/}{../../common/logos/}%
 #+latex_header:               {pics/}{../images/}{../../images/}{../pics/}{../../pics/}%
 #+latex_header:               {../figures/}{../../figures/}{../logos/}{../../logos/}{../../../logos/}%
 #+latex_header:               {../../communication/web/graphics/carousel/}%
 #+latex_header:               {../../communication/web/graphics/pictos/png/400x400/}%
 #+latex_header:  }
 # some default information I did not find how to set this in org-mode
 
 # to add the picblock macro
 #+latex_header: \usepackage{extblocks}
 #+latex_header: \usepackage{pgfpages}
 #+latex_header: \usepackage{animate}
 #+latex_header: \usepackage{alltt}
 #
 # Itemize in multiple columns
 #
 #+latex_header: \usepackage{multicol}
 #
 # Requires
 #
 # http://www-ljk.imag.fr/membres/Jerome.Lelong/latex/appendixnumberbeamer.sty
 #+latex_header: \usepackage{appendixnumberbeamer}
 
 #
 # Colors, color boxes
 #
 #+latex_header: \usepackage{color}
 #+latex_header: \usepackage{soul}
 
 # http://tex.stackexchange.com/questions/41683/why-is-it-that-coloring-in-soul-in-beamer-is-not-visible
 #+latex_header: \makeatletter
 #+latex_header: \newcommand\SoulColor{%
 #+latex_header:   \let\set@color\beamerorig@set@color
 #+latex_header:   \let\reset@color\beamerorig@reset@color}
 #+latex_header: \makeatother
 #+latex_header: \SoulColor
 
 #+LATEX_HEADER: \usepackage{listings}
 #+LATEX_HEADER: \usepackage{forcebeamermode}
+
+#
+# Color of links
+#
+#+LATEX_HEADER: \hypersetup{colorlinks,linkcolor=,urlcolor=cyan}
diff --git a/common/modules/prelude.org b/common/modules/prelude.org
index 8eb0903..657428c 100644
--- a/common/modules/prelude.org
+++ b/common/modules/prelude.org
@@ -1,91 +1,96 @@
 #+BEAMER_HEADER: \titlegraphic{\includegraphics[width=\extblockscale{0.7\textwidth}]{SWH-logo+motto}}
 
 #+STARTUP: hidestars
 # activate org-beamer-mode minor mode automatically
 #+STARTUP: beamer
 
 # org export options
 #+LANGUAGE:  en
 #+OPTIONS:   H:2 num:t toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
 #+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+LINK_UP:
 #+LINK_HOME:
 #+LaTeX_CLASS: beamer
 #+LaTeX_CLASS_OPTIONS: [presentation,xcolor=table]
 
 #
 # important font choice!
 #
 #+LaTeX_HEADER: \usepackage{libertine}
 
 #
 # Let's move that logo...
 #
 #+LaTeX_HEADER: \usepackage{animate}
 
 #+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
 
 # have the theme desired
 #+latex_header: \mode<presentation>{\usetheme{swh} \beamertemplatenavigationsymbolsempty \setbeamertemplate{navigation symbols}{} \setbeamertemplate{headline}{}
 #+latex_header: \setbeamertemplate{footline}
 #+latex_header: {
 #+latex_header:   \leavevmode%
 #+latex_header:   \hbox{%
 #+latex_header:   \begin{beamercolorbox}[wd=.5\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
 #+latex_header:     \usebeamerfont{author in head/foot}\insertshortauthor%~~\beamer@ifempty{\insertshortinstitute}{}{(\insertshortinstitute)}
 #+latex_header:   \end{beamercolorbox}%
 #+latex_header:   \begin{beamercolorbox}[wd=.5\paperwidth,ht=2.25ex,dp=1ex,right]{title in head/foot}%
 #+latex_header:     \usebeamerfont{title in head/foot}\insertshorttitle{}\hspace*{2em}
 #+latex_header:     \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
 #+latex_header:     \insertframenumber{} / \inserttotalframenumber\hspace*{2ex} 
 #+latex_header:   \end{beamercolorbox}}%
 #+latex_header:   \vskip0pt%
 #+latex_header: }
 #+latex_header: }
 
 # some color
 #+latex_header: \rowcolors[]{1}{blue!10}{blue!05}
 
 # set the paths for images
 #+latex_header: \graphicspath{%
 #+latex_header:               {../../common/images/}{../../common/logos/}%
 #+latex_header:               {pics/}{../images/}{../../images/}{../pics/}{../../pics/}%
 #+latex_header:               {../figures/}{../../figures/}{../logos/}{../../logos/}{../../../logos/}%
 #+latex_header:               {../../communication/web/graphics/carousel/}%
 #+latex_header:               {../../communication/web/graphics/pictos/png/400x400/}%
 #+latex_header:  }
 # some default information I did not find how to set this in org-mode
 
 # to add the picblock macro
 #+latex_header: \usepackage{extblocks}
 #+latex_header: \usepackage{pgfpages}
 #+latex_header: \usepackage{animate}
 #+latex_header: \usepackage{alltt}
 #
 # Itemize in multiple columns
 #
 #+latex_header: \usepackage{multicol}
 #
 # Requires
 #
 # http://www-ljk.imag.fr/membres/Jerome.Lelong/latex/appendixnumberbeamer.sty
 #+latex_header: \usepackage{appendixnumberbeamer}
 
 #
 # Colors, color boxes
 #
 #+latex_header: \usepackage{color}
 #+latex_header: \usepackage{soul}
 
 # http://tex.stackexchange.com/questions/41683/why-is-it-that-coloring-in-soul-in-beamer-is-not-visible
 #+latex_header: \makeatletter
 #+latex_header: \newcommand\SoulColor{%
 #+latex_header:   \let\set@color\beamerorig@set@color
 #+latex_header:   \let\reset@color\beamerorig@reset@color}
 #+latex_header: \makeatother
 #+latex_header: \SoulColor
 
 #+LATEX_HEADER: \usepackage{listings}
 #+LATEX_HEADER: \usepackage{forcebeamermode}
+
+#
+# Color of links
+#
+#+LATEX_HEADER: \hypersetup{colorlinks,linkcolor=,urlcolor=cyan}