Workaxis, workplanes, and workpoints can be created through a large and varied number of ways.
When working with parts that you have not used for some time, or even parts design by others it can be difficult to determine how the work geometry was constructed.
"Is this plane offset, tangent, or though three points?"
If you hover over the work geometry in the browser you will get a tool tip that gives you the construction method of the work geometry.
This still might not be enough to determine which geometry was used to create it thought.
New in Inventor 11 you can right mouse click on the construction work geometry and from the context menu select Show inputs.
In the graphics window the input geometry used to create the selected work geometry will be highlighted, making it perfectly clear how it was created.
Weather you needed to edit or redefine the work geometry, you now know exactly how.