Pix has both “Shrink to Fit” and “Stretch to Fit” options and they can be selected independently. Whats with that?
The two options determine how images of different sizes should be displayed: Shrink To Fit only applies to images that are larger than the preview window. If enabled, it reduces the display size of the image so that it fits within the preview window. Stretch To Fit only applies to images that are smaller than the preview window. If enabled, it enlarges the display size of the image to the dimensions of the preview window.