I believe this tools are not design for this purpose.
Ghost roof in revit.
Use it to extend the dormer roof to the main roof.
Using shape editing tools.
After creating a roof you can change its shape or overhang cut openings or align ridges.
Https youtu be pl5jqj8btfc wall layers in revit tutorial.
Revit and autocad tutorials.
This is the easiest way to do it.
Welcome to my channel i create videos and tutorials for architects.
Then follow these 2 steps.
This tool is located in the modify tab.
For creating complex roof it might be easier if you create separate roof then use join roof tool to join them later.
Colours and range included.
Bristile roofing bim library.
Use join unjoin roof tool.
You need to create the bay window roof separately.
See hd version of video tutorial here.
Jpeg cad and revit files to assist in specifying and building with bristile roofing.
But i m not really sure if this is a best practice.
Roof construction in revit.
Edit the roof sketch double click the roof or select the roof and click modify roofs tabmode panel edit footprint or edit profile.
If you want to change the position of the roof use the properties palette to edit the base level and offset properties to change the position.
9 join roofs add opening to create dormer.