Hi,
Cover zones more or less do what they say. AI's will attempt to find cover behind entities around 40 units high, or approximately half the height of a standard character. Cover zones enable you to fine tune the cover by declaring other areas as cover. Rotate the arrow so that the point is aligned with the area you want to define as cover.
We've started a series of tutorial videos and we've just uploading one on placing characters
here. This is only a basic tutorial, but we'll be expanding on this information to include cover zones and how to use them this week.
SC
i7-4770s 3.10ghz - Geforce GTX 650ti