The Clarinet Event Editor allows to filter by string selection.
      The Clarinet Event-Editor includes a filtering function accessible
      through a displayed selection :
      
        
          | A panel allows to edit the string from the command
            line:
             Edit -> Edit String Filter  
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          | Only the events including the display of
            the defined string are displayed:
               
            The above screen shows the filter based over the Call Reference
            of ISDN messages. The string '00 01) was
            selected to filter the first ISDN communication.   | 
        
        
          | 
            
             Following optionally a string filter action, the event-editor
            allows  to count a range of events displayed on the screen: 
            
              - the beginning of the range is define by a marker
 
              - the end of the range is defined by the event under the cursor
 
             
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          | The "Event Date" or  F5 Function  is
            used for setting the marker  | 
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          | It also provides the date of the event | 
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          | The beginning of the range has an
            indication "first marker". It will stay valid until a
            new 
              
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             By using the navigation keys or the
            search function,  the cursor is moved to the last event of the
            range. 
             
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          | The "Event Count" or CTRL F5 function allows
            to count the number of events of the range. | 
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          | The "Event Delay" or SHIFT F5 function
            allows to count the time between the first and the last events of
            the range. | 
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