Is there a feature that once I set up my PJ and the screen if it doesn't quite fill the screen or is too large that will allow me to to adjust the image to perfectly fit a PJ screen? Looking between the BenQ HT2050A and the BenQ HT3050. One has both vertical and horizontal keystone the other has just vertical I believe. I watched some videos on keystone which seems to correct image in ways but not sure if this really "fits to screen" or not. If this is not the case, is there a PJ feature that does this that I should be looking for in a PJ?