1. Go to the Automation section in the sidebar navigation.
2. Then choose Trigger on the drop down options.
3. Select the Trigger that you'd like to duplicate.
4. Click the More dropdown button in the right hand corner, and click Duplicate Trigger.
5. You will be routed to a page where you can make changes to the duplicated trigger. Once you're done editing, on the upper right part of the page click on Save and Exit.