Answer by  
                                                                                          kazmooth (197)
                                                            
                          
                          
                                                          You can do it by clicking the Format tab on top menu, click Line, then click Spacing and set line spacing to 2.0, and hit OK. You can also do shortcut method by highlighting the area or text lines that you  want double-spaced, then press CTRL+2 keys on your keyboard.