Select your desired contacts, then click on the first drop-down button at the top left of your window. Click on “Change Campaigns”.
You can add the contact(s) to any number of new campaigns, remove the contact(s) from any number of campaigns, or both. Click on the fields to reveal the lists of campaigns. Click on the “Save” button to confirm the process, or click on the “Cancel” button to abort and close the dialogue window.’