How do I watch movies (e.g. Ultra HD Blu-ray, Blu-ray movies) in full screen mode seamlessly on an ultra-wide 21:9 monitor in CyberLink PowerDVD 18 or later versions?

To watch movies (certain Ultra HD Blu-ray/Blu-ray/DVD movies apply this aspect ratio) on an ultra-wide 21:9 monitor, use the Crop-to-fill feature to crop out the black areas on all four sides of the video for a better fit with the following steps:

1. Start video playback in PowerDVD.
2. Click the  button on playback control bar to zoom in on the video and crop the excessive parts.
3. Click the  button to disable the cropping.

The video will be zoomed to full screen on a 21:9 display device as below: