How do I properly inventory the foils that I have separate from the non-foils? I cannot seem to figure out how to do it in my Deckbox inventory.

when inventorying, click the little settings wheel right after the condition and language options. In there you can choose; foil, signed, misprint, etc.

You also may need to first select to create another line for the card if you have both non-foil and foil versions of the same card

I also have created a "foil" deck which I put all my foils in, since I generally don't collect foils.

How do you create a line to separate the non-foils from foils?

Gelven wrote:How do you create a line to separate the non-foils from foils?

Just hit the plus again.