<p>The photo labs probably don't like to turn it off because apparently the "hold" button only applies to color corrections, not DSA settings unless they've set up the noritsu to apply it to them too. They have to click each image and change the grain reduction.....That said, there are several default correction settings that they can have stored in the noritsu computer, they could create scan chanels with grain reduction off, medium and high, and have them listed as such on the computer screen.</p>