Ocean525

As a moderator can you direct me to instructions on how to use this forum? I have a question but I am clueless how to post it in this forum. Hopefully you will not be upset asking it now:

I have a new completed house design with a 2nd floor over one section. I want to add to that 2nd floor to an adjoining area with a present (lower) roof line at 90 deg. I raised the roof up and in 2nd fl view added the new walls but it will not recognize the 2nd floor in this area. The options in the Build New Floor do not represent what I need. How do I fix this?