Jeff Hiller
                                                                                                                                                    COMSOL Employee
                                                         
                            
                                                                                                                                                
                         
                                                
    
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                                                Posted:
                            
                                8 years ago                            
                            
                                22 mai 2017, 14:07 UTC−4                            
                        
                        Updated:
                            
                                8 years ago                            
                            
                                22 mai 2017, 14:09 UTC−4                            
                        
                        
                                                    Hello Prashant,
To select a boundary that is hidden inside a part, turn on transparency or wireframe rendering, and then use your mouse's scroll wheel (See 
www.comsol.com/support/knowledgebase/1168/).
If you still want the software to display the boundary numbers for some reason, check the Show Geometry Labels checkbox on the View node. Boundary numbers will be displayed when you have a boundary condition node selected in the Model Builder.
Best,
Jeff
PS: This video summarizing several ways of selecting geometric entities may be useful to you as well: 
www.comsol.com/video/selecting-geometric-entities-comsol-multiphysics                                                
                            Hello Prashant,
To select a boundary that is hidden inside a part, turn on transparency or wireframe rendering, and then use your mouse's scroll wheel (See https://www.comsol.com/support/knowledgebase/1168/).
If you still want the software to display the boundary numbers for some reason, check the Show Geometry Labels checkbox on the View node. Boundary numbers will be displayed when you have a boundary condition node selected in the Model Builder.
Best,
Jeff
PS: This video summarizing several ways of selecting geometric entities may be useful to you as well: https://www.comsol.com/video/selecting-geometric-entities-comsol-multiphysics