The Nikon D3400 Retouch Menu is the fourth Menu on offer in this camera. It is essentially a Menu for retouching and changing the images that you have already taken. Whilst there is nothing in here that you could not do better on a computer with appropriate software, it does give you the opportunity to make the in-camera changes that can quite dramatically change the way that your pictures look and prepare your pictures to be uploaded onto social media, via the camera's bluetooth connectivity.