at the top right of your screen there are 4 boxes. the one that looks like a graph is the health tracker and that will be where you can update your weight. you will see the button for the ticker there.
Age: 44 | Height: 5' 3" | Starting January 2015: 291 | RNY 8/4/15 with Dr. Arthur Carlin| Goal: 150
Listen to advice and accept discipline, and at the end you will be counted among the wise. ~Proverbs 19:20