Update 3 2 open data

3-2-open-data.md

 # Opening data files (and how to use Variables Pane)
+
 ### 1. Opening data files.
 You can load and display the meteorological data from GRIB/GRIB2/NETCDF files saved in the your computer.
 
@@ -22,7 +23,7 @@ By default, the variables are grouped by category and displayed with ID. You can
 
 *  You can group variables by clicking *Grouping* button.
 
-![](img/3-2-2-variables-grouping.png)
+                       ![](img/3-2-2-variables-grouping.png)
 
 *  You can display name or ID of variables by clicking *Text* button.