You can also specify the no scale option, which guarantees that the window size and the viewport size are always identical. When no scale is specified and you change window size, ESL ignores the change. When no scale is specified and you change viewport size, ESL changes both the viewport size and the window size. This ensures that scaling is never necessary, greatly reducing display time. All file based images loaded into an Image Region at runtime use the no scale option regardless of the attribute set within the image region.