Camera settings : 
                        Zoom : Wheel-Scroll 
                        Pan : Mouse-Wheel and Drag
                        Rotate : Key-CTRL + Mouse-Right and Drag
                        Center : Key-'Space' 
                        Type : Key-O ( orthographic ) 
                                Key-P ( perspective ) 
                                                
                        Toggle Auto-rotation : Key-R 
                                                
                        Toggle Show-Dimension : Key-D

                        Toggle Show-Cube : Key-C

                        Toggle Show-Frame : Key-F

                        Toggle Show-Grid : Key-G