1. If you are in a stream, you can tap on the streamer's Avatar or Profile icon and then tap 'View full profile'.
Note: This won't kick you out of the stream, it will simply minimize the stream window, so you don't miss out on any action.
2. Tap 'Reviews' and then tap 'Add Review'.
3. Now you can leave a rating, as well as provide feedback about your experience with this streamer.
