diff --git a/compendium.pdf b/compendium.pdf
index e31b5df..4cd512e 100644
Binary files a/compendium.pdf and b/compendium.pdf differ
diff --git a/compendium.tex b/compendium.tex
index 46c8769..640ed7f 100644
--- a/compendium.tex
+++ b/compendium.tex
@@ -4,6 +4,14 @@
 
 \usepackage{pmboxdraw} % provides angled lines for tab:phylolevels
 
+\definecolor{explainboxframe}{RGB}{170, 255,125}
+\usepackage[framemethod=default]{mdframed}
+\mdfsetup{skipabove = \topskip, skipbelow = \topskip}
+\mdfdefinestyle{explainbox}{%
+	linecolor=explainboxframe, linewidth = 2pt, rightmargin = 0cm, leftmargin = 0cm,
+	li
+}
+
 %opening
 \title{Botanik \& Systematik der Pflanzen}
 \author{Jeff Jonczyk}
@@ -22,6 +30,11 @@
 % ### PREFACE ###
 %\pagenumbering{none}
 \section*{Einleitung}
+dsadsadsa
+\begin{mdframed}[style=explainbox]
+	content...
+\end{mdframed}
+
 
 
 % ### TOC ###