a zone is fixed to a special ad-format. So our problem is, that at the moment (without adserver) we display different ad-sizes at the same place/zone (2 zones, 4 formats = 2 formats per zone).
Like Skyscraper (120x600px) and Wide-Skyscraper (160x600px) at the same place (right column), or Banner (468x60px) and Double-Banner (468x120px) at an other place (middle column).
1-3 ads per place/zone are displayed in rotation (when the site is refreshed/ new loaded).
Can I combine two zones or different ad-formats?
When there would be a code at the website like "choose zone 1 and 2 in rotation", then there is a problem displaying 3 adverts. So we need a code like "take zone 3" and revive has to know that this means "deliver all ads of zone 1 and 2".