Favourite an Outcome or Progress Tracker
When you add an outcome or progress tracker to a project, it means that the metric is now also listed in your Personal Library in the Metrics App
Steps
Go to the Metrics App (select My Apps in the top menu and choose Metrics)
Go to your Organisation Library
Click the More Options menu for that metric
Select Add to personal library
The metric will now appear in your personal library (i.e. your favourites)