How to change Amazon prime video streaming quality using Firestick

Amazon Prime Video Stream Quality Can be change.
Follow below steps-
1. Press Home button .
2. Go to Settings
3. Select Preferences.
4. Choose Data Monitoring.
5. Select "Set Video Quality".
6. Select as per your convenience.
i. Good - Low Quality.
ii. Better - Medium Quality.
iii. Best - High Quality.

Cheers..!!

Firestick