Any sent or unsent campaigns that you’ve created can be cloned.
Sometimes it is a good idea to save unsent campaigns and use them as “template campaigns”. This is handy as it means you can easily modify preferred designs for continual re-use, reused email recipients, avoiding having to repeatedly copy and then edit a specific campaign or, even less preferably, start completely from scratch.
You can create a copy of any unsent or sent campaign by clicking on the Clone button: