What's the difference ? Is it literally the direction the eyes have to be in ?
I just stumbled upon this community so I have no idea how this works haha. But I'm pleased to see that my useless superpower that makes it very easy for me to visualize autostereograms is also working with these.
When your left eye focuses on the right and vice-versa, in other words cross-eyed, this is cross view. Parallel view is starting past the image and focusing your eyes anyway. Usually parallel view is easier on a large screen.