Update 4 1 horizontal scalar field

4-1-horizontal-scalar-field.md

@@ -13,6 +13,7 @@ Open your data file(s), using buttons on the **_Menu Bar_**
 In order to load the variable on a layer, you can either 
 * click the _Add Layer_ menu buttons on _Layer_ menu category, and select variable/area/level etc., or 
 * select the temperature variable on the _Variables Pane_, and click 'OK' to add layer.
+_Rendering Pane_ will immediately display the distribution, and a new layer will be added to the _Layers Pane_.
 
 ##### 3. Change the settings for color mapping (if necessary).