A Campaign for your publisher is created the same way it is done usually with some additional settings.
1. Fill in all the obligatory fields:
2. Select the Traffic Source you have created for your publisher (Publisher panel Traffic Sources). After you will choose it, you will notice the additional button "Details for publishers":
3. Go to "Details for publishers" to set additional information for your publishers:
Place some description
Place the Advertiser
Put Preview and Preview Image URLs (you can use any file sharing service for the purpose)
Set the traffic type, categories, countries and OS
4. Save the changes. Now your publishers will see this Campaign as the Offer they can promote in the pub panel.