Home » Tip of The Day » Lock GuidesLock Guides February 28, 2018. Posted in: Tip Of The Day. If you want to lock your guides so you don’t accidentally move them, you can press Ctrl Alt ; (semicolon) (Mac: Command Option ; ) or you can go to the View menu and choose “Lock Guides”. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: