Sharpening Previews in Camera Raw February 10, 2016. Posted in: Tip Of The Day. When working in Camera Raw’s Detail tab, you can hold Alt (Mac: Option) while dragging on the sliders in the Sharpening section to see a grayscale preview of the changes you are making to the image. « Previous Photoshop Tip: | Next Photoshop Tip: » Get The Tip of The Day in Your Inbox! Sign-up for the PTC Newsletter to receive a weekly re-cap of the Tips of The Day. That way you'll never miss a tip. You'll also get instant access to the Subscriber Only Tutorials! Enter your email below to sign up! Your Email Address: You Can Also Get Daily Tips On Your Feed! Every Photoshop Tip of The Day is posted in our Facebook & Google Plus, Twitter, LinkedIn, and Pinterest pages.