Roof Line Assistance

[wmccourt]

Hi Everyone,

I am a new user of Home Designer Pro (I am using the 2022 version) and all of the information is great. I am trying to redesign a house layout so I can add a new enclosed porch on the back. My question is this:

 

How do you design two different gable roofs easily (its the lower roof area over the garage that is next to the 2nd floor gable wall)? I've been struggling with this one. I have attached images of the home. If this isn't the area where to post this question, I apologize in advance! 

Thank you everyone!