Home » Tip of The Day » Loading Luminosity Keyboard ShortcutLoading Luminosity Keyboard Shortcut February 15, 2017. Posted in: Tip Of The Day. Press Ctrl Alt 2 (Mac: Command Option 2) on the keyboard to load the luminosity of an image as a selection. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: