Detail view geometry and cross hatch can't be selected for editing.
Solution
1. Use Mouse button 3 to highlight the Detail view.
2. From the drop down menu select 'Make Independent'.
3. Now the geometry and the cross hatch can be selected.
Notes and References
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: DRAFTING
Version: V1847
Function: DRAWING/VIEW
Ref: 001-9600179