How to Enable and Disable NX Cursor Crosshair?
In NX Cursor crosshair can be enabled and disabled using the option provided in the selection preferences.
1. Open any excising part or Create a new part (As Selection preferences will not be available in ‘No Part’ state.)
2. Open ‘Selection Preferences’ by
File > Preferences > Selection or
Menu > Preferences > Selection or
Use keyboard shortcut ‘Ctrl + Shift + T ‘
3. Under ‘Cursor’ group, Enable checkbox ‘Show Crosshairs’ and OK

Size of the selection cursor radius can be changed using ‘Selection Radius‘ option which has three values as: Small, Medium and Large.
By default it is set to ‘Medium’.
Now cursor crosshair will be displayed in NX graphics window. Switching from Modeling application to other applications like Drafting, Sheet Metal etc. will retain the crosshair display.
To Disable the crosshair display, Go to the selection preferences and uncheck the checkbox ‘Show Crosshairs’ > OK.
Note
There is no customer default setting available to control display of cursor crosshairs.
Until NX 12, ‘Show Crosshairs’ setting was stored in the registry at below location
HKEY_CURRENT_USER > Software > Unigraphics Solutions > NX > Selection > Crosshairs
From NX 1847 onwards, this setting is stored at below location
e.g. C:\Users\UserName\AppData\Local\Siemens\NX1980\UserPreferences.txt
Links: NX Documentation | NX CAD Tips & Tutorials