|   | 9 |  | 
                  
                          |   | 10 |  | 
                  
                          |   | 11 | == Contours of a scalar variable == | 
                  
                          |   | 12 | [[Image(ex1.png,right)]] | 
                  
                          |   | 13 |  1. Open VisIt and `noise.silo` with a single command or use File -> Open | 
                  
                          |   | 14 | {{{ | 
                  
                          |   | 15 | #!sh | 
                  
                          |   | 16 | visit -o /opt/visit-2.6.2/data/noise.silo | 
                  
                          |   | 17 | }}} | 
                  
                          |   | 18 |  1. Type `Ctrl+I` to display info about the data opened and then close the window | 
                  
                          |   | 19 |  1. Click Add -> Contour -> hardyglobal | 
                  
                          |   | 20 |  1. Click Draw | 
                  
                          |   | 21 |  1. Double click on Contour (or Right-click ->Edit plot description) | 
                  
                          |   | 22 |  1. Under select by choose ->N Levels enter 5 | 
                  
                          |   | 23 |  1. Change the opacity levels | 
                  
                          |   | 24 |  1. Click Apply | 
                  
                          |   | 25 |  1. Click Dismiss | 
                  
                          |   | 26 |  1. Click Delete | 
                  
                          |   | 27 |  |