diff --git a/docs/docs.pdf b/docs/docs.pdf
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diff --git a/docs/parts/troubleshooting.tex b/docs/parts/troubleshooting.tex
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--- a/docs/parts/troubleshooting.tex
+++ b/docs/parts/troubleshooting.tex
@@ -1,13 +1,20 @@
 \newsection
 \section{Troubleshooting}
-\subsection{pgfkeys: Don't know mainboxstyle}
-You have most likely forgotten about \verb|\usetcolorboxes| after \verb|\startDocument|.
 
-\subsection{Missing headers \& footers}
+\subsection{Visual Errors}
+\subsubsection{Missing headers \& footers}
 You have most likely forgotten about \verb|\startDocument| after \verb|\begin{document}|, or you are using \verb|\setupbarebones| or \verb|\setupexams|.
 
 You can easily distinguish from simply looking at the PDF. If the title is missing too, it's the first one, if it is there, it is most likely the second.
 
+\subsubsection{Right box of guides tcolorbox is a weird title}
+You have most likely forgotten about the second argument. Then, the first letter is removed from the body and used as the title.
+
+\subsection{pgfkeys: Don't know mainboxstyle}
+You have most likely forgotten about \verb|\usetcolorboxes| after \verb|\startDocument|.
+
+
+
 \subsection{Undefined commands}
 You have most likely loaded a too small \textit{scope}