How to get apps on iPhone to close differently?

I didn't really know how to phrase the question so sorry if it's confusing haha.
So my apps close out like going back into the app kind of or something i don't know how to describe it, but my friend has it so that his apps fade really quick when they close out. So how can I get that? His phone isn't jail broken or anything.

Please Make Clear? The Question. In English!

I think what you're seeing is Parrallax. To turn off parallax: Settings>>General>>Accessibility and setting Reduce Motion to on.

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