Update 4 2 vertical scalar field

4-2-vertical-scalar-field.md

@@ -9,17 +9,16 @@ This guide can also be applied to the visualization of any scalar field on verti
 
 Open your data file(s), using _Open Data_ buttons on the _Home_ menu category of _Menu Bar_.
 
-##### 2. Load the temperature variable and show it on a layer.
+##### 2. Load the temperature variable and show it on a vertical cross-section.
 
-In order to visualize the distribution of the variable on a layer, you can either
+In order to visualize the distribution of the variable on a vertical cross-section, your dataset should include multiple datasets of the same variable at different altitudes. If you indeed have multiple datasets, you can either
 
-* click the _Add Horizontal Plane_ menu button on _Layer_ menu category, select options, and then click "OK", or 
-* right-click the temperature variable on the _Variables Pane_, select _Add Horizontal Plane'.
-* double-click the temperature variable on the _Variables Pane_, and click 'OK' to add layer. 
+* click the _Add Vertical Cross-section_ menu button on _Layer_ menu category, select options, and then click "OK", or 
+* right-click the temperature variable on the _Variables Pane_, and select _Add Zonal/Meridional/Vertical Cross-section'.
 
 _Rendering Pane_ will immediately display the distribution, and a new layer will be added to the _Layers Pane_.
 
-##### 3. Explore temperature distributions at different altitudes (if any).
+##### 3. Move the position of the cross-sectional plane.
 
 If your dataset includes wind flow datasets at multiple altitude, you can select a particular height level, or easily change to the next/previous height level.