You can specify in the IDE which mainframe display to use by default. 
                  	  
               
            
 
            	  
            	 
             
               		
               - In the IDE, click 
                  		  Window > Preferences. 
                  		
               
- Expand 
                  		  Micro Focus > Enterprise Server, and click 
                  		  TN3270. 
                  		
               
- Ensure that 
                  		  Enable display is checked. 
                  		  
                  If you leave this unchecked, you can still execute your application but no display is available when you run or debug the
                     application. 
                     		  
                   
- Click one of the options to specify the integrated TN3270 display to use: 
                  		  
                   
                  		
               
- Click 
                  		  OK.