+\end_layout
+
+\begin_layout Description
+mathpopup Formula parts will be highlighted.
+
+\series bold
+
+\series default
+
+\begin_inset Note Greyedout
+status open
+
+\begin_layout Plain Layout
+
+\series bold
+Note:
+\series default
+ The PDF-Markup inset cannot be used for this option!
+\end_layout
+
+\end_inset
+
+ Instead the command
+\series bold
+
+\backslash
+pdfmarkupcomment
+\series default
+ woll be used in a formula with this scheme:
+\begin_inset Newline newline
+\end_inset
+
+Command:
+\begin_inset Newline newline
+\end_inset
+
+
+\series bold
+
+\backslash
+pdfmarkupcomment[style=mathpopup]
+\backslash
+{formula part}
+\begin_inset Formula $\to$
+\end_inset
+
+
+\backslash
+{
+\backslash
+text
+\begin_inset space \textvisiblespace{}
+\end_inset
+
+
+\begin_inset Newline newline
+\end_inset
+
+optional comment}
+\begin_inset Newline newline
+\end_inset
+
+
+\series default
+Result:
+\end_layout
+
+\begin_layout Standard
+\begin_inset Formula
+\[
+\pdfmarkupcomment[style=mathpopup]{\sum_{i=1}^{n}i=\frac{1}{2}n\cdot(n+1)}{\text{little Gauss}}
+\]
+
+\end_inset
+
+