Update 4 1 horizontal scalar field

4-1-horizontal-scalar-field.md

@@ -10,7 +10,9 @@ Open your data file(s), using buttons on the **_Menu Bar_**
 
 ##### 2. Load the temperature variable and show it on a layer.
 
-You can either (1) click the _Add Layer_ menu buttons on _Layer_ menu category, and select variable / area / height level etc., or (2) select the temperature variable on the _Variables Pane_, and click 'OK' to add layer.
+You can either 
+* click the _Add Layer_ menu buttons on _Layer_ menu category, and select variable / area / height 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).