Mapped Fields

Hello,

I am trying to edit the mapped fields. They are currently linked to one entity, I would like exactly the same information for a secondary entity. For example [P1_First Name_0] [P1_Last Name_0] would be [P2_First Name_0] [P2_Last Name_0]. Can I easily change this? I tried find and replace and that did not work because it only changes the inside contents but does not update the field itself. Is there a different way or do you have to do it through properties in the development tab one at a time? I mean is there a way to change the titles without having to open the Properties menu?

Thank you!