NX Untrim a trimmed curve feature

User trimmed a curve feature and found out that the curve should not have been trimmed. Searched for the Untrim feature option but it's not available.

After adding an associative Trim Curve feature, the Trimmed Curve displays in the view and the untrimmed Parent curve is hidden. To view the Untrimmed parent curve go to Edit --> Show/Hide --> "Invert Shown and Hidden". At this point, you can use Edit --> Show/Hide --> Hide to Hide the parent curve.  Use "Invert Shown and Hidden" again. The Trim Curve feature can now be deleted and the parent untrimmed curve is displayed.