In the properties dialog box for the view you want to see the overhang lines in set the underlay drop down to be the level on which the roof was created.
Revit roof plan underlay.
Now it s at this point where i could just trace over the perimeter.
In other words using a level above as a reference for a lower level.
Plumbing fixtures appliances etc but now in 2019 i am unable to select anything in the underlay.
Create an underlay when you need to understand the relationship of components at different levels for coordination and construction.
When i draw a roof plan i keep the level below on as an underlay which is automatic when opening the roof view.
1 st floor no overhang.
But up until i upgraded to revit 2019 i always selected items in the underlay that i didn t want to show up and hid them.
Revit displays the modify linework contextual ribbon.
This issue occurs because there is an incorrect view range in the main view.
Once i do this my roof element become visible in the ground floor plan.
In the project browser open a plan view.
Walls doors windows nothing is select able.
When you tried to underlay a floor only doors and windows were visible.
On the properties.
For example you may want to set an underlay for the casework in the kitchen to make it easier to place the light fixtures above.
We recently had a team working on a high rise project and they wanted to use the level 8 plan as an underlay for the level 5 design.
In the view properties expand the underlay drop down and select the level on which the roof was created to display as an underlay.
Use the underlay parameters on the properties palette to set an underlay.
If you re experiencing problems displaying elements using the underlay property of a revit view the feature just might be behaving as designed.
If the view range intersects the geometry of a level in your main view that level cannot be used as an underlay in the main view.
So i change the underlay parameter you find this is the properties palette to the level where your roof or roof light canopy etc resides.
This makes the roof line visible in the plan view but the lines appear as solid lines.
In the main floor level the bottom of the primary range is set to main floor with an offset of 1.
In this example my roof element is at level 1.