\textbf{Description}: Some firmwares clear only part of screen when switching
from graphics to text mode, leaving a fragment of previously drawn image visible.
This option fills the entire graphics screen with black color before switching to
This option fills the entire graphics screen with black \DIFdelbegin\DIFdel{color }\DIFdelend\DIFaddbegin\DIFadd{colour }\DIFaddend before switching to
text mode.
\emph{Note}: This option only applies to \texttt{System} renderer.