It’s not easy to find Relationship Lag in Primavera P6 project schedules. There aren’t really any features to highlight lag. But understanding how leads or lags are used on your project is an important part of really knowing your schedule. We need a process to root out any relationship lags in P6.
Here's a link to the tutorial if you are interested. https://www.planacademy.com/primavera-relationship-lag/ [1]
Regards,
Michael