⌘ Opt I Show or hide the inspector window.
⌘ Shft P Page setup: Display a window for selecting document settings.
⌘ Shft S Display the Save As dialog, or duplicate the current document.
⌘ Shft Minus sign (-) Decrease the size of the selected item.
⌘ Shft +: Increase the size of the selected item. Command–Equal sign (=) performs the same function.
⌘ Shft ?: Open the Help menu.
FINDER SHORTCUTS
⌘ D Duplicate the selected files.
⌘ E Eject the selected disk or volume.
⌘ F Start a Spotlight search in the Finder window.
⌘ I Show the Get Info window for a selected file.
⌘ Shft C Open the Computer window.
⌘ Shft D Open the desktop folder.
⌘ Shft F Open the All My Files window.
⌘ Shft G Open a Go to Folder window.
⌘ Shft H Open the Home folder of the current OS X user account.
⌘ Shft I Open iCloud Drive.
⌘ Shft K Open the Network window.
⌘ Shft L Open the Downloads folder.
⌘ Shft O Open the Documents folder.
⌘ Shft R Open the AirDrop window.
⌘ Shft U Open the Utilities folder.
⌘ Opt D Show or hide the Dock. This often works even when you're not in the Finder.
⌘ Ctrl T Add the selected item to the sidebar (OS X Mavericks or later).
⌘ Opt P Hide or show the path bar in Finder windows.
⌘ Opt S Hide or show the Sidebar in Finder windows.
⌘ Slash / Hide or show the status bar in Finder windows.
⌘ J Show View Options.
⌘ K Open the Connect to Server window.
⌘ L Make an alias of the selected item.
⌘ N Open a new Finder window.
⌘ Shft N Create a new folder.
⌘ Opt N Create a new Smart Folder.
⌘ R Show the original file for the selected alias.
⌘ T Show or hide the tab bar when a single tab is open in the current Finder window.
⌘ Shft T Show or hide a Finder tab.
⌘ Opt T Show or hide the toolbar when a single tab is open in the current Finder window.
⌘ Opt V Move the files in the Clipboard from their original location to the current location.
⌘ Opt Y View a Quick Look slideshow of the selected files.
⌘ Y Use Quick Look to preview the selected files.
⌘ 1 View the items in the Finder window as icons.
⌘ 2 View the items in a Finder window as a list.
⌘ 3 View the items in a Finder window in columns.
⌘ 4 View the items in a Finder window with Cover Flow.
⌘ Left [ Go to the previous folder.
⌘ Right ] Go to the next folder.
⌘ Up Open the folder that contains the current folder.
⌘ Ctrl Up Open the folder that contains the current folder in a new window.
⌘ Down Open the selected item.
⌘ Mission Control Show the desktop. This works even when you're not in the Finder.
⌘ Brightness Up Turn Target Display Mode on or off.