Update 3 4 control perspective

3-4-control-perspective.md

@@ -4,8 +4,36 @@ After adding a new layer or selecting a layer from the list, **Rendering Pane**
 
 ![](img/3-4-rendering-pane.png)
 
+
+*  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.
+
+
 You can control the display options in **Rendering Pane** as follows.
 
+### Changing the display mode
+
+In the **Rendering Pane**, the *polar coordinates* is set by default. You can change the display mode from the *polar coordinates* (globe) mode to the *Cartesian coordinates* (map box), or versus, as follows.
+  1.  In *Menu Category*, choose *Home* category.
+  1.  In *Map* panel, click the upper part of the *Globe* button to change the display mode.
+
+      ![](img/3-4-rendering-pane.png)
+
+
+### Showing/Hiding Legend and Color Bar
+
+*  You can show or hide the *Legend* and the *Color Bar* as follows.
+      1.  In *Menu Category*, choose *Home* category.
+      1.  In *Map* panel, you can 
+          *  click the upper part of the *Legend* button to show or hide the *Legend*; or
+          *  click the lower part of the *Legend* button to show or hide the *Color Bar*.
+
+             ![](img/3-4-show-hide-legend.png)
+
+*  You can also show/hide the *Legend* by double-clicking the *Legend*.
+
+
+
 ### Setting color map and limit range
 
 *  You can edit the color map and limit range of the current layer as follows:
@@ -24,7 +52,7 @@ Note that the options in the *Contour Levels* panel and the *Emphasis Level* pan
       1.  In *Menu Category*, choose *Home* category.
       1.  In *Layer Setup* panel, you can 
           *  click the upper part of the *Layer Option* button to see the *Setup Colormap and Limit Range* dialog box; or
-          *  click the lower part of the Layer Option* button to select the detail setup options.
+          *  click the lower part of the *Layer Option* button to select the detail setup options.
 
              ![](img/3-4-layer-option-detail.png)
 
@@ -32,16 +60,27 @@ Note that the options in the *Contour Levels* panel and the *Emphasis Level* pan
 
 ### Zooming in/out
 
+*  Scroll up or down to zoom in to or zoom out from the display area of the **Rendering Pane**. For finer adjustments, scroll up or down while pressing the *Ctrl* key. 
+
+*  You can set the zoom (in/out) level and viewpoint of the *3D - Image* to the default values by  
+      1.  In *Menu Category*, choose *Home* category.
+      1.  In *Map* panel, click the *Zoom Fit* button.
+
+          ![](img/3-4-zoom-fit.png)
 
 
 ### Rotation
 
+*  If the coordinate system is in polar coordinates (globe), hold the left mouse button and drag the globe to rotate the map area. 
 
+*  If the coordinate system is in Cartesian coordinates (map box), hold the left mouse button and drag the box to rotate the map area. 
 
-### Right-click
 
+### Right-click
 
+You can right-click the *Legend* or the *Limit Range* to speed up the setting options for the layer.
 
+![](img/3-4-right-click.png)
 
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