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Click on the save icon at the top of the screen to save your Persona.
Editing
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and reviewing a Persona
Clicking on the persona row will open the Persona and allow you to see it in more depth.
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Clicking on the Red Delete icon will delete your Persona. This action should only be used for Personas that you have created, not for those automatically generated by the event data load. The reason for this is that if a persona with the same name is deleted and an event with that persona name flows back through, it will be recreated and this may become confusing.