Home » Tip of The Day » Show / Hide Grids and GuidesShow / Hide Grids and Guides September 14, 2016. Posted in: Tip Of The Day. Press Ctrl (Mac: Command) ; (Semicolon) to show/hide Guides. Press Ctrl (Mac: Command) ‘ (Apostrophe) to show/hide Grids. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: