\subsection{Grayscale} {\centering\itshape [Warning: Image ignored] % Unhandled or unsupported graphics: %\includegraphics[width=4.359cm,height=2.492cm]{images/rockbox-manual-img50.png} \newline Grayscale \par} This is a demonstration of the Rockbox grayscale engine which supports grayscalegraphics on the Jukebox. Press OFF to quit the demo.