It cannot be done. The zoom feature of PowerDVD is disabled when a Blu-ray disc is detected. (I'm actually surprised a representative of Cyberlink is unaware of this and asked for a screenshot.)
If you Google this, you'll see it's been an ongoing complaint about PowerDVD for some time now—since 21:9 monitors came out. A partial solution is
here but it doesn't work completely properly with a 3440x1440 resolution screen. (You'll also note that this was also posted on a Cyberlink forum, where a different employee gave the correct response.)
I don't know why Cyberlink has not yet allowed zoom to work with Blu-ray discs. The claim has been that the horizontal black bars are part of the encoding—but other Blu-ray capable players do indeed allow you to zoom Blu-ray playback. (VLC, Kodi, Leawo...). So this is not a
technical limitation. It may be that it's a legal limitation, and while Cyberlink could do it, they are unwilling to do it. It's not entirely clear to me, but it may be that the black bars are actually
enforced as part of AACS Blu-ray copy protection. (If that's the case, I find it totally absurd since they have nothing at all to do with copy protection.)
Blu-ray copy protection can be removed with software like RedFox's
AnyDVD—and that's the only way to get Blu-ray discs to display on the other software players I mentioned (and cropped / zoomed to fill an entire 3440x1440 21:9 monitor.)
I have a 21:9 monitor, and own both PowerDVD 16 and AnyDVD. I've been struggling with this for quite some time now. There is no question that PowerDVD supports some Blu-ray discs better (in particular, I bought PowerDVD because VLC couldn't properly handle one of the Star Trek episodes in my Blu-ray set—I have no idea why there was a problem with a specific episode) but I also watch anything with an aspect ratio of 21:9 (or 2.4:1) with VLC instead. I hate having to go back and forth between software just because of something silly like this.
One other point is that PowerDVD seems to base its "decison" on the existence of Blu-ray media when it disables the zoom feature—it's not basing its decision on the existence of AACS. Even when AnyDVD is enabled, and AACS is removed, the zoom function is still not present on Blu-ray playback. (With VLC, the feature is called "crop", not "zoom".)
This message was edited 2 times. Last update was at Mar 11. 2017 15:52