Update 3 3 open layer

3-3-open-layer.md

@@ -74,19 +74,41 @@ The *Layer Name* is created in the following format: %VARIABLE NAME% : %SECTION
 
       ![](img/3-3-2-close-all.png)
 
-      You can also show or hide the layers by choosing *Layer* category in *Menu Categories*. In *View* panel, click the *Close* button.
+      You can also close the layers by choosing *Layer* category in *Menu Categories*. In *View* panel, click the *Close* button.
 
 
+##### Arranging layers
+
+   You can click the *Automatic Z-Order* to set the rendering order of layers added to the **Rendering Pane** based on the distance between the viewpoint and the center position of the layer map area. 
+
+      ![](img/3-3-2-arrange-layer.png)
+
+      The *Background Map* and *Borderlines Map* layers are always rendered first.
+
+      When multiple layers are overlapped, the layer with the larger distance from the viewpoint lays under the layer that is closer to the viewpoint. The rendering order determines the transparency (alpha channel) effect.
+
+      You can also close the layers by choosing *Layer* category in *Menu Categories*. In *Layer Profile* panel, click the *Automatic Z-Order* button.
+
 ##### Saving/Opening layers
 
-*  You can save 
+*  You can save the layer list in the current 3-D image in **Rendering Pane* into a layer profile file by clicking *Save* button on the control bar.
+
+      ![](img/3-3-2-save.png)
+
+      You can also save the layer list by choosing *Layer* category in *Menu Categories*. In *Layer Profile* panel, click the *Save* button.
 
+*  You can load the saved layer list from the layer profile file by clicking *Open* button on the control bar.
 
-*  You can open the saved 
+      ![](img/3-3-2-open.png)
 
+      You can also load the saved layer list by choosing *Layer* category in *Menu Categories*. In *Layer Profile* panel, click the *Open* button.
 
 ##### Right-click
 
+You can control and edit a layer by selecting that layer and right-click.
+
+![](img/3-3-2-layers-right-click.png)
+
 
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