You can adjust the Delivery% of your Campaigns at the Source level at any time. Here’s how:
1. Login to your Advertiser Console.
2. Click Campaign >> Sources tab.
3. Click the Delivery% adjacent to the desired Source.
4. Select the appropriate option from the drop down list.
5. Click Save.
You can modify the Delivery% for more than one Source at a time. For details on the same refer to ‘How can I bulk edit Sources for my Campaign?‘