Yes there is. We recently added that to the BER test set. You can plot BER versus any parameter in the system. NOTE: this is in the BER test set, not the BER Analyzer. For the BER Analyzer, you would have to create these plots by hand (by copying/pasting the results into a program like excel).
An example for this usage is file “112Gbps Coherent DP-QPSK_B2B_theory with DSP.osd” in the “Documents\OptiSystem 12 Samples\Advanced modulation systems\PSK systems” directory. One has to set up multiple sweep iterations first because you are plotting graphs of the results from data of multiple runs.