ALT is 63, AST normal range. I am obese, high triglycerides, bad eating, and pretty sedentary. Diet and exercise to get levels down? Any supplements you would recommend in addition? I hear the liver is resilient, responds well to lifestyle changes.

Lifestyle changes. are definitely helpful in reversing "fatty liver" due to obesity. The liver is very resilient, but recover requires major changes, which are often difficult to make and even more difficult to maintain. It requires a great deal of determination and consistency. Medications can be helpful but only along with the necessary lifestyle changes. See:
NAFLD. This picture can be associated with non-alcoholic fatty liver disease. You may need statin drugs added to your regimine.
Milk Thistle. Milk thistle is one of the very few supplements I will recommend- people have success with fatty liver.