When you orbit your Revit model the outlines and hatches disappear. I find this effect very ugly and defeats the purpose of examining your model in 3D using Orbit. Revit used to have a simple checkbox in the Options-Graphics dialog to disable or enable, but not any more. Now we need to edit the Revit.ini...sigh.
Add text OptimizedViewNavigation=0 under the [Graphics] heading in the Revit.ini
The Revit.ini can be found here:
Add the text here:
Discalimer: Read this Revit help before editing the ini...