Select circular region from EVDS1 centred on (234.5,506.7) and with radius 25 and put selected events in dataset SOURCE,
Select an annular region of width 10 (=35-25) around the outside of previous region and put events in dataset BCGND,ICL> EVCSUB EVDS1 SOURCE 234.5 506.7 25
ICL> EVCSUB EVDS1 BCGND 234.5 506.7 ANNULUS 35 25