How do I change skins?

I am supposed to have the shadow skins, but I don't know how to change them so I can't check to see if I do or not.  How do I change them?

Thanks,

Crystal

How I do it... bring up hero deck, right click on any hero and select swap, now on the left side click on the hero you want to customize and on the right side click on the Customize Hero button, change things and click the Confirm button. gl making the changes save from game to game .

Edited June 16 by SuperFX
right left left right