Home » Tip of The Day » Increase/Decrease Text Size Keyboard ShortcutIncrease/Decrease Text Size Keyboard Shortcut December 4, 2016. Posted in: Tip Of The Day. To increase and decrease your text size, select all of your text in a type layer and press Ctrl Shift < or > (Mac: Command Shift < or >). « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: