-Vectorscope is used as monitor with other plugins to correct color, adjust image tint, and apply other effects for cinematic effects, image correction, or to conform images to look the same. For example, skin tones are found along an axis (\textit{+ I-line}) between yellow and red, and between $0$ and $50\%$ saturation values. The blue of the sky is more or less along the opposite axis to that of the skin (\textit{- I-line}), with a much wider saturation range.
+\begin{figure}[hbtp]
+ \centering
+ \includegraphics[width=0.9\linewidth]{videoscope05.png}
+ \caption{Vectorscope (with I-Line) and VectorWheel (with IQ-Hue-Tics reticule)}
+ \label{fig:videoscope05}
+\end{figure}
+
+Note that when you choose \textit{VectorWheel} from \textit{Scopes} pulldown, the \textit{Overlay} pulldown
+appears where you can choose between different grids. In addition, any number of user-supplied grid patterns
+can be added in the form of a square image of type png. The user can design and maintain individual grid
+overlays for various purposes. The user would keep their overlays in a safe spot on their disk and make
+a copy of them in the \{cinelerra\_pathname\}/bin/plugins/scopes every time a new version of \CGG{} is installed.
+
+Generally the Vectorscope has the following uses:
+
+\begin{enumerate}
+ \item Compare saturation levels (radius) between Edits.
+ \item Compare the hues (angle) between Edits.
+ \item Compare skin tones, sky and vegetation.
+ \item Display the color balance or color cast.
+ \item Check the legal limits of the video signal.
+\end{enumerate}
+
+ For example, skin tones are found along an axis (\textit{+ I-line}) between yellow and red, and between $0$ and $50\%$ saturation values. The blue of the sky is more or less along the opposite axis to that of the skin (\textit{- I-line}), with a much wider saturation range.