http://communities.ptc.com/ideas/1719Up to Pro/ENGINEER 2001 it was possible to use the Represent View function to simplify individual views by removing features from the model for them.
It was replaced by using Simplified reps and in most cases using Simplified Reps is more efficient (can be reused for multiple views).
However, when it comes to flexibility, using Simplified Reps has the disadvantage, that it is not possible to use a simplified rep in a detail view or another child view, when the parent view uses the master rep - or vice-versa.
It should be allowed to set simplified rep individual for views as an alternative to following the parent view (similar to layer states following drawing or being individual).
Note that this is desired for assemblies AND parts.
(Related Product Idea to allow redefining the simplified rep of part views exists: "Redefine a master rep general view and convert it in a simplified rep view for a PART drawing" at http://communities.ptc.com/ideas/1719)