I did not get any responds here. PTC TS said to file enhancements request.
Here is what happens: I am testing creo1 on a virtual image and, obviously, have poor graphics performance. Preselection highlighting shows up as shaded solid instead of that transparent green and makes it very difficult to work especially in assemblies. So, were is no config option to turn it to wireframe like it was in wildfire.
But here is a somwhat a workaround: you can either turn preselection highligting off or create a filter that does not include Quilt, Surface, Feature, Part and Component.
In Reply to Dmitry Ushamirsky:
Pre-selection highlighting appeared to be shaded in green in creo1. How do I turn it back to wireframe highlighting as it was to wildfire 4.0?