Since Revit 2019 is now an "Obsolete Version" in the eyes of Autodesk:
Before you open that file, remember the golden rule of Revit:
You can finally see and manipulate levels directly in 3D views. Search results for revit 2019 (19)
Introduced the modern tabbed interface, making it easier to switch between floor plans and 3D views.
If you are collaborating with consultants, ensure is on 2019. Mixing versions within a linked project can cause coordination nightmares. 📥 Where to Find Downloads Since Revit 2019 is now an "Obsolete Version"
The first version to allow you to drag views out of the main window onto a second screen.
Work in perspective mode without the view being forced into a "crop box." Mixing versions within a linked project can cause
Running software that is several years old requires a bit of extra care to keep it stable.