To convert a standard campaign into a triggered campaign:
Go to Campaigns > Email.
Find and select the campaign you want to convert. This opens the campaign in EasyEditor.
Go to the Campaign details page by selecting Create or BACK.
Select CAMPAIGN SETTINGS.
For Type, select TRIGGERED.
Select APPLY.
Select SAVE & CONTINUE or SAVE.
Find the campaign in the Triggered email campaigns area: Automation > Triggered email.