Update 3 4 control perspective

3-4-control-perspective.md

 # Controlling perspective (and how to use Rendering Pane)
 
-After adding a new layer or selecting a layer from the list, **Rendering Pane** displays the meteorological data in the 3D-image and contains some options for controlling perspective.
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 ![](img/3-4-rendering-pane.png)
 
+After adding a new layer or selecting a layer from the list, **Rendering Pane** displays the meteorological data in the 3D-image and contains some options for controlling perspective.
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 *  The *Legend* shows a brief explanation and the colormap of the selected layers.
 *  The *Color Bar* shows the variable names and units of the selected variable.