Select Text To receive Strikethrough, and press Control + S. Now, open Pages document you want to use Strikethrough In. Click Add button and quit System Preferences. In Keyboard Shortcut field, choose Keyboard buttons you want to trigger action. On Applications drop - down, choose Pages. Press + button To Add New Shortcut, and a new dialog window will pop up. Now launch Keyboard, choose Shortcuts, and Click on App Shortcuts. Click on Apple logo and choose System Preferences. First, check UI T Pages if it is running on your Mac. The Strikethrough option on Pages is available in the Font submenu under Format Menu.