Chat about the original Pixelmator.
There is no such option at the moment. What you can do is just change the Mouse scroll direction in System Preferences. However, this will take an effect both in scrolling, zooming. So in other words - there is no App specific option for changing a scroll direction.
I sure hope this is going to be fixed soon. I'm using Pixelmator Pro 1.2.1 Quicksilver and the scroll zoom is still not following the system zoom. Changing the system preferences is not a good option, since I would need to reset it before and after each time using Pixelmator Pro. Just make the app follow what the system preference is set to, no need to change the direction within the app.
Any updates on this? Pixelmator Pro is near unusable at the moment (okay, perhaps a bit hyperbolic – but all my other apps has "normal" scrolling and zooming behavior that adheres to the system settings.)