[Zubersoft]

The single page display performs a high quality zoom when you pinch zoom, and saves that zoom level so that the next time you load the song, it uses the same zoom. You can adjust this in the zoom & pan settings. The two page display mode only supports a temporary zoom where you zoom in to look at something, then zoom back out before continuing. So you shouldn't be using the zooming feature in the two page display if you are just trying to enlarge the page. For that, use the cropping feature, as that won't impact the quality of the rendering. If the two page display looks "out of focus" even without any zooming, then it may be the quality of the images in the PDF. Do you know what the resolution of the images are in the PDF? Were they scanned at 300 DPI or higher?

Mike