Home » Tip of The Day » Load Channel As SelectionLoad Channel As Selection February 13, 2018. Posted in: Tip Of The Day. You can load channels as selections by using a keyboard shortcut. Red Channel: Ctrl Alt 3 (Mac: Command Option 3). Green Channel: Ctrl Alt 4 (Mac: Command Option 4). Blue Channel: Ctrl Alt 5 (Mac: Command Option 5). « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: