-Now the mask is probably still very harsh, so just below the Chromakey (HSV) plugin, add a \textit{Blur} effect, and select only the \textit{Alpha channel}, with a radius of $2$ or $3$ (more if you really want to soften the edges). This will significantly help the keying.
+All buttons work globally on the whole parameter set. Each time the ChromaKey dialog is opened, the \textit{Store} values are cleared and reset to default. Therefore, if you press \textit{Recall} having not pressed Store beforehand, it will do the same as \textit{Reset}. Each time the dialog is closed, the Store values are forgotten (reset to defaults). As long as the dialog remains opened, Store values remain intact, even if the current timeline position changes. The operations on distinct parameters (turning sliders etc.) do not update the \textit{Undo} values. The following operations update values for subsequent Undo: Global Recall, Exchange, Reset buttons (but not the buttons which reset individual parameters), opening the dialog, and moving current position in the timeline.
+
+Now the mask is probably still very harsh, so just below the Chromakey (Avid) plugin, add a \textit{Blur} effect, and select only the \textit{Alpha channel}, with a radius of $2$ or $3$ (more if you really want to soften the edges). This will significantly help the keying.
+
+\subsection[Chroma Key (HSV)]{Chroma Key (HSV)}%
+\label{sub:chroma_key_hsv}
+\index{chroma key HSV}
+
+Chroma Key (HSV)\protect\footnote{Credit for Plugin by Jerome Cornet \url{http://jcornet.free.fr/linux/chromakey.html}} (figure~\ref{fig:chroma-key-hsv}) replaces a color with another color or transparency using HSV variables. This plugin is replaced by the better Chroma Key (Avid) and is maintained only for reasons of compatibility with old projects.
+Refer to Chroma Key (Avid) for theory and parameter descriptions, which are quite similar, except the description of spill suppression, which differs considerably.
+
+\begin{figure}[htpb]
+ \centering
+ \includegraphics[width=0.55\linewidth]{chroma-key-hsv.png}
+ \caption{Windows config for Chroma Key (HSV)}
+ \label{fig:chroma-key-hsv}
+\end{figure}
+
+\qquad \textit{Spill light control section}
+
+In this section we try to make halos, reflections and parasitic lights present on the foreground less noticeable.
+
+\begin{description}
+ \item[Spill light control:] This step helps you remove the green or blue halo around the edges of the mask. It does so by removing the saturation of pixels of the foreground that have a similar hue to the key color, turning them into gray instead of green or blue. The hues to be desaturated are set with \textit{Spill Threshold}, the degree of desaturation is set with \textit{Spill Compensation}. In order for Spill compensation to work, Spill Threshold must be > 0. If you start with Spill Compensation at $100\%$, slowly increase the \textit{Spill Threshold} until the remaining green or blue areas turn gray. Then reduce Spill Compensation until the image looks good.
+\end{description}