Hоw to set aspect ratio?
1. To pull up the control panel using the player, move the focus using the remote control.
2. Press the Settings 
button in the lower left corner.
3. Choose
a. Content mode:
- Fill width to fit the video by its width.
- Fill height to fit the video by its height.
- Zoom to fit the video by proportional zoom.
b. Aspect ratio→Original / 16:9 / 4:3 to choose screen aspect ratio.
