CST EM Studio Voltage Monitor?

Hey!

I need help for EM Studio. I try to explain it with an easy example. I want set in Low Frequency Domain solver a current Port on the one side of a cylinder and then show the voltage in this cylinder.

How i can set the Voltage Monitor? I find anywere this Option with Low Frequency Domain Solver. I

It would be very nice if someone can help me!

Thank you!