Update 4 1 horizontal scalar field

4-1-horizontal-scalar-field.md

@@ -11,7 +11,7 @@ Open your data file(s), using buttons on the **_Menu Bar_**
 ##### 2. Load the temperature variable and show it on a layer.
 
 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 / height level etc., or 
+* 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.
 
 ##### 3. Change the settings for color mapping (if necessary).