Update 3 2 open data

3-2-open-data.md

@@ -9,19 +9,19 @@ To open a file or a directory containing multiple files:
 
 
 
-### 2. Using Variable Pane.
+### 2. Using Variables Pane.
 
 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:
+By default, the variables are grouped by category and displayed with ID. You can customize the options to display variables by clicking buttons on the control bar of *Variables Pane* as follows:
 
-*  You can group variables by clicking *Grouping* button (the second button on the control bar of *Variable Pane*).
+*  You can group variables by clicking *Grouping* button.
 
 ![](img/3-2-2-variables-grouping.png)
 
-
+*  You can filter variables by clicking *Filtering* button .