To access this feature, please follow the steps below:
Go to your Profile Image.
Click 'Settings'.
You'll see two toggles for Body Measurements and Nutrition Measurements.
Body Measurements
This will update all body-related measurements (e.g. height, weight and other progress tracking data) and the weights recorded in your Workout Tracker.
Nutrition Measurements
This will update the measurements for all recipes and ingredients in your Meal Guide and Food Database, as well as your Shopping List and Water Tracker.