Is there any guide on how to use or adjust it?
Viewing post in Perspective Panorama effect for Clickteam Fusion comments
Oh hey, it has an example, the parameters have to be changed according to your app resolution, so you may have to try different values until you get the look you're going for.
I'm considering making an update to keep the effect consistent on different resolutions, but it may be a bit difficult to get it right.
Be aware that the values are floats, meaning you have to input numbers after the dot to fine tune it.