diff --git a/primer/primer.pdf b/primer/primer.pdf
index 62c54f9a0957b779097becb587fc7a558e0f8283..99b0c706a184a58079fc631601b47e7c06c85d4f 100644
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diff --git a/primer/primer.tex b/primer/primer.tex
index 1d886e74357eccc705316e7e93cacac5920d7753..2dde6569376e48acffac22258f58bb7d2642d23b 100644
--- a/primer/primer.tex
+++ b/primer/primer.tex
@@ -69,6 +69,8 @@ elsewhere~\cite{Kohlhase:tsmgs13,Kohlhase:cmsmglom14,KohJuc:edsmglom14,Kohlhase:
 (consult them for details and further discussion). In this primer, we want to give a
 hands-on introduction for the \smglom author and curator.
 
+
+
 \section{\smglom Concepts}\label{sec:terminology}
 
 Before we can understand the workflow details and how-tos, we first need to get an
@@ -329,7 +331,9 @@ notation in line 2.
 
 \begin{lstlisting}[label=lst:binom,caption=Alternative Notation Definitions]
   \symdef[name=binomial-coefficient]{binom}[2]{\left(#1\atop #2\right)}
+  \symtest{binomcoeff}{\binomcoeff{n}k}
   \symvariant{binom}[2]{c}{\mathcal{C}^{#1}_{#2}}
+  \symtest[variant=c]{binomcoeff}{\binomcoeff[c]{n}k}
 \end{lstlisting}
 
 The call pattern
@@ -344,9 +348,23 @@ Listing~\ref{lst:binom} |\binom{n}k| expands to $\left(n\atop k\right)$ and
 
 Finally, we can use |\symtest| to test the newly defined macros:
 |\symtest[|\meta{keys}|]{|\meta{cs}|}{|\meta{test}|}| will generate a phrase describing
-the test\ednote{MK: complete this}.
+the test. For instance, the |\symtest| macros in the listing above will generate the test
+output:
+\begin{quote}
+  Symbol |binomcoeff| with semantic macro |\binomcoeff|: used e.g. in
+  $\left(n\atop k\right)$
+
+  Symbol |binomcoeff| (variant |c|) with semantic macro |\binomcoeff[c]|: used e.g. in
+  $\mathcal{C}^n_k$. 
+\end{quote}
 
 \subsection{Specifying Presentation Declaratively}
+The notations in the semantics macros are somewhat unrealistic, since they use {\TeX}
+primitives directly to express the layout of the basic mathematical operators. In \smglom
+we usually use the more sophisticated facilities of the |presentation| package from \sTeX
+instead. In a nutshell -- see~\cite{Kohlhase:ipsmsl:svn} for details -- provides
+primitites for mixfix (infix, prefix, postfix, \ldots) notations with precedences. 
+
 \ednote{MK: need to talk about the presentation package.}
 
 \section{Authoring and Managing \smglom content in \mathhub}\label{sec:mathhub}