Answer by  
                                                                                          nickyann (363)
                                                            
                          
                          
                                                          A basic rule is for images that fill the slide, the image size should be equal to the video screen's resolution.  Most resolutions are set at 1024 x 768.  If you have very detailed images, they sometimes look better at a higher resolution.  You may want to try the same image at different several resolutions.