Update 4 2 vertical scalar field

4-2-vertical-scalar-field.md

@@ -48,7 +48,7 @@ Double click the vertical _Color Bar_ on the right-hand side of _Rendering Pane_
 You can control the size and location of the plane by using _Rendering Pane_ only. To do this, you need to :
   1. switch from _Globe_ mode to _Map_ mode,
   2. double-click one of the corners of the plane, to reveal the control handles,
-  3. drag the control handles to change the size and location. 
+  3. drag the control handles to change the size and location of the plane. 
 
 ![](img/4-2-1-control-handles.png)