Click Recurring Donations located at the top of the page and select the recurring donation that you want to transfer. Click Edit.

You will be redirected to a new page that will allow you to change a recurring donations campaign. 

From the drop-down, select the campaign that you want to change the recurring donation to and click Change. You will see a popup notification asking you to verify that you want to change the campaign. Click 'okay.' Your donors recurring donation has now been changed to your new campaign.