Message from Pascal Manuel via mantid help:
When you select an area in "Peak", it does a crude focussing which is very useful.
It would be good to include any peaks from PeakWorkspace(s) the that is/are plotted in the resulting detector plot view.
Hi Pascal,
I’ve created this issue for your feature request. @mantid_roman is assigned to it for the 3.6 release, he may have more questions about your feature.
Owen.