What’s the shortcut for Duplicate in Photoshop? To duplicate an object in Photoshop, first, choose the thing you wish to duplicate after which press Ctrl+J (Home windows) or Command+J (Mac). How do you duplicate a number of occasions in Photoshop? To repeat and duplicate in Photoshop, first choose the objects you wish to copy or duplicate. Subsequent, use the keyboard shortcut Command+C (or Ctrl+C on a PC) to repeat the objects. To duplicate the objects, use the keyboard shortcut Command+D (or Ctrl+D on a PC).