Details
The column width for "descriptive part name" accidentally got set wider than the screen because of a large component pattern. Dragging the slider bar does not move the column far enough to see the other columns.
Solution
When the column is stretched way out to the right, you can use the slider bar on the bottom of the window to see the columns to the right. BUT, if you do move the slider bar and the columns do NOT display,
this means that the column is frozen.
To unfreeze these columns, put your cursor in the ANT and do a Right Mouse Button and there should be
an option for "Unfreeze". Select Unfreeze and now the scroll bar will move the other columns into the Assembly Navigator and allow you to drag the column border to make the column with a smaller width.
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: ASSEMBLIES
Version: V12.0.2
Function: NAVIGATORS
Ref: 002-8516674