Sometimes you may want to move those prospects that did not open your emails into a duplicated campaign to give them another chance. Smart filters help you to do this:
1. On the Campaigns page, create a duplicate campaign.
2. Open the original campaign and navigate to the People tab.
3. Create a smart filter with the following properties: Status: Opened and False.
4. Apply the filter to sort the prospects.
5. Select these prospects and move them to a duplicate campaign.