\def\GWslide{\begin{frame} \frametitle{Excel}
  \begin{figure}[t]
    \centering
    \GWig{width=0.7\textwidth}{Handling/CompAlgSystems4Golem/excel/figs/import.PNG}
  \end{figure}
File$\rightarrow$Open$\rightarrow$
\url{http://golem.fjfi.cvut.cz/utils/data/<\#ShotNo>/<identifier> }
\begin{block}{Spredsheets (Excel and others)}
are not recommended, only tolerated.
\end{block}
\end{frame}}