Issue:
You want to create a view on your drawing that has some parts shaded and some that look wire-framed, so you can show some particular detail of your assembly in your detailed drawing.
In the past you could do it as described in tip #1 at this link, but that seems not to work now.
http://inventortrenches.blogspot.com/2011/06/autodesk-inventor-tips-from-around-web.html
Solution:
Here is another way to do this.
Create one new Positional Representation ( no need to do anything else with it, other than creating it).
Here's a link to a quick video I created, but I think the CADLine blog has covered this better at this link:
https://www.cadlinecommunity.co.uk/hc/en-us/articles/115001863349-Inventor-Partial-Shaded-Drawings