NX 12 Sketch environment

I am a beginner in NX. Am using NX 12. Trying to create a solid model, while i used to Dimension inside the sketch environment am unable to select the edges of the base solid profiles. I just wanted to know how to enable the edges selection inside the sketch environment. Already i have enabled all options like Mid point, End point in selection group, kindly share you comments to enable the edges selection while dimension

2 Answers

Can't screenshot in a reply... but firstly, check that your selection parameters look similar?

Entire Assembly selection