Home » Tip of The Day » Copying Smart FirltersCopying Smart Firlters June 17, 2015. Posted in: Tip Of The Day. The same shortcut for copying a layer mask from one layer to another also works with Smart Filters. In the Layers panel hold Alt (Mac: Option) and click-and-drag on the Smart Filter icon to duplicate it to another layer. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: