mViewer GX Creator - fit to screen size option? TI-89

Hi ya'll - I am using mViewer GX Creator and I am trying to autofit my images to the exact width of my ti-89 to minimize scrolling or hitting the arrow buttons 500 times. Whats the best way to do this? I am using tictexpv() to view the images as suggested and I cant find a zoom out option either if it exists?