Creo View: Measure tool, select next/behind

Looking for some guidance, hopefully I'm missing something..

Using Creo View 8

When referencing PVZ models in Creo View I often have to measure components to check sizing, and often the surfaces from which I want to measure are behind another object, surface, etc. When using the measure tool, and having selected a first reference point, I then attempt to select another reference, which is obscured, by Ctrl+right click, as I would do in Creo Parametric, or Ctrl+scroll wheel, but this results in every selectable reference being added to the measurement setup window as I cycle through. Is there something I'm missing here? Why would the selection operation be different to that in Creo Parametric, and downright dysfunctional? I can cycle to an obscured reference, as long as I don't mind removing tens of errant references after reaching the intended surface.

Is there some setting, or another way to select behind? I don't want to have to hide or isolate components as I frequently have to reference large assemblies, and this wouldn't be a problem if the selection behaved the same as in Creo Parametric.

Thanks for any hints or insight!

Nairn