How do we list foils in decks

[Cure for the Common Game]

I am new to the site, recently transferred over from another deck listing site, so i am still learning how to use all the features.
I cannot seem to figure out a way to mark cards as foils when listing decks, i have tried mobile and desktop to no avail.
I love the site so far, and i know its probably here i just dont know where to find it, any help would be greatly appreciated.

[Morganator 2.0]

If you're on mobile, tap the card you want to foil out, and check off the box that says "Foil" (there is also a star next to it).

On desktop, click on the pencil icon, and then check off the box that says "Foil". It will also have a star next to it.