Sometimes our best creations happen by pure experimentation and accident. Sitting in front of a Photoshop file, you are 40 History States in, and then it happens—magic! You really want to be able to get back to that moment. To do so, make sure that you turn on the History Log checkbox in the General Preferences (Photoshop>Preferences>General [PC: Edit>Preferences>General]). You can save the information as metadata, as a separate text file, or both!