In residential architecture as well as other types it is often a required part of the working drawing set to be able to show the roof overhang as a hidden line on the floor plan views.
Revit roof plam.
Make sure the floor plan view you choose to work in is associated with the level at which you want to create your roof at.
If you try to add a roof on the lowest level a dialog prompts you to move it to a higher level.
Tutorial on roof construction modeling in revit.
Some may call this wysiwyg or what you see is what you get.
In the view properties expand the underlay drop down and select the level on which the roof was created to display as an underlay.
Get these project files and all advanced 1h courses.
Open the plan view of the level in which you want to see the roof line.
Click architecture tabbuild panelroof drop down roof by footprint.
Out of the box revit doesn t do this because revit shows it as it s built.