Only the graphics window is displayed. The Ribbon is disappearing and missing.
Solution
This may be Full Screen mode. If the mouse cursor is hovered over the thin grey strip at the top of the
graphics window while in Full Screen mode, the ribbon bar will appear, and the
button for Full Screen mode can be selected to toggle it off.
Or, simply select Atl+Enter to exit Full Screen mode.
Notes and References
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: SYSENG
Version: V10.0.3
Function: UI_TOOLS
Ref: 001-8949571