If you were using CCI in your LVS flow to help you find nets and devices with RVE, you can get the same thing to happen in your PEX flow using the Net Summary Report option. When you enable the Net Summary Report, you can highlight layout objects using RVE's Finder tool.
Search for Tech Note MG570825 for details.
CalibrePEX GUI
Outputs -> Reports -> Net Summary -> Net Summary Report -> my_net_summary.rpt
resulting CalibrePEX deck:
PEX REPORT NETSUMMARY "my_net_summary.rpt" FULL DETAIL SCALE 1 COLUMNS ADVANCED
Vern