January 24, 2024 at 9:51 am
Niki Papachristou
Ansys Employee

Hi 석영 신,

Thank you for reaching out to us and for attaching images of your simulation! I am afraid I still don't understand what are the red markers, is it a structure in the object tree? As for the ports you can find more information here: Ports (FDTD) - Simulation Object

Kind Regards, 

Niki