Home » Tip of The Day » Reveal Measurement Guides Between LayersReveal Measurement Guides Between Layers May 31, 2017. Posted in: Tip Of The Day. In Photoshop CC, with the Move Tool selected you can hover over an object while holding Ctrl (Mac: Command) to reveal measurement guides between the currently selected layer and the layer that you are hovering over. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: