suggestion for relations fields

Thank you for you constant support

and a slide layout to display articles in horizontal

This you can do in template of the article.

and a slide layout to display articles in horizontal

great idea for relations fields is to be able to select which fields to show

That woud be difficult. What we can add is sorting parameter. But not selector of individual items.

In fact like that : http://demo.zoolanders.com/index.php/en/elements/related-items-pro

this is related item for ZOO

in template ?

No in the field.