how to read vswr

Normaly I used vswr(S(1,1)) for VSWR value reading.
Can I read VSWR value when I put a mark on the S11 trace without
set any equation in ADS ? Thanks a lot.

i thank you can,waht's the problem?

I don't know how to do it ? Could you please tell me which function
can show VSWR directly without doing any setup. Thanks.