In wide-eyed viewing, the two images are presented side by side. The left eye image is on the left and the right eye image is on the right.
So, you need to relax your eye muscles so that your eyes spread apart and center on each image (left on the left one and right on the right one).
This is hard to do because we have trained our eyes over the course of our life to orient and converge on the same object. If we didn't we'd have double vision.
To view wide-eyed you have to unlearn this. It takes practice.
One trick is to "look through" the image pair as if you were really looking at an object very far away.
The pictures for wide-eyed viewing are smaller since we can cross our eyes easier than we can spread them apart.