OPM CE snapping to OPM entities

How to measure distance between pipe, or distance from any OPM entity to other object?

Based on not being able to snap to OPM entities, and not being able to drop these objects.. 

Referenceing

https://communities.bentley.com/products/electrical___instrumentation/f/elcocad-promis-e-forum/125861/snap-to-quardrants-of-a-pipe

and

https://communities.bentley.com/products/electrical___instrumentation/f/elcocad-promis-e-forum/182513/opm-ce-drop-element