Update 3 2 open data

3-2-open-data.md

@@ -11,10 +11,16 @@ To open a file or a directory containing multiple files:
 
 ### 2. Using Variable Pane.
 
-After opening data files, the *Variables Pane* displays a hierarchical tree structure of the variables in your data. By default, the variables are grouped by category and displayed with ID. You can customize the options to display variables as follows:
+After opening data files, the *Variables Pane* displays a hierarchical tree structure of the variables in your data. 
+
+![](img/3-2-1-variables-pane.png)
+
+By default, the variables are grouped by category and displayed with ID. You can customize the options to display variables as follows:
 
 *  You can group variables by clicking *Grouping* button (the second button on the control bar of *Variable Pane*).
 
+![](img/3-2-2-variables-grouping.png)
+