SuzIBR

I am having issues with the proper Advertiser being linked (able to choose) for a particular ad size (when trying to link the ad to the zone). Up until now, there's only been 1 Advertiser associated with this one ad size. I now need 3 additional Advertisers to be able to selected. I've created the zones already for these ad sizes. Is this something I can do inside Revive or is it some code that our corporate IT folks have to do? Thank you in advance!