Update 4 1 horizontal scalar field

4-1-horizontal-scalar-field.md

@@ -8,7 +8,11 @@
 
 ##### 2. Load the temperature variable and show it on a layer.
 
-##### 3. Explore temperature distributions at different altitudes (if any).
+##### 3. Change the settings for color mapping (if necessary).
+
+##### 4. Change the visualization modes (if necessary).
+
+##### 5. Explore temperature distributions at different altitudes (if any).
 
 
 <br><br>