| (1) [ Instrument ] button | Opens [Instrument     
      ] dialog  
      box. | 
  
    | (2) [ Previous   
      Item ] button | Allows  
      you to select the previous option of the instrument. | 
  
    | (3) [ Instrument]   
      window | The  
    selected instrument will be displayed. 
     | 
  
    | (4) [ Next   
      Item ] button | Allows you to select the next  
    option of the instrument. |