In order to add contacts from one campaign to another, you must first create the new campaign and save the message you would like to send. If you are unsure how to create a new campaign please see Creating A Campaign
Next, open the campaign that you would like to add your contacts from. To do this select Campaigns from the navigation then select view next to the campaign you want to add contacts from.
Next, you will select the contacts you would like to add to the new campaign but selecting the boxes on the lefthand side of the table next to the phone numbers. You can select contacts one at a time, you can select all in the current page view or you can select all contacts in the campaign.
Once you have selected the contacts you would like to add to the new campaign, select the box icon next to the pencil at the top of the table.
Next, select the Add button next to the Campaign you would like to add your selected Contacts to then select Close.
Next, open your new campaign and select Next.
After selecting Next you will see the contacts that you have added from your other campaign. Be sure to refresh your browser in order for your contacts to appear.
Your Contacts have now been added to your new campaign. If you don't see them all try refreshing your browser again. You can now move on to scheduling your campaign or you can add more Contacts manually, from a Workflow or from a .csv file. You do not have to worry about duplicate contacts the system will handle those.