After a Program has been created, you can add or remove additional campaigns from that Program.
Steps
From your Organization Dashboard, select Programs.
Select the Program you would like to add or remove campaigns from.
From the Program Dashboard, select Campaigns on the left side menu.
Select Add Campaign in the top right corner. You can select one or multiple campaigns to add to your program.
Click Save.
To remove a campaign, hover over the campaign in your Program Dashboard, click the three dot menu, and select Remove campaign from Program.