You can use the marquee tool. Draw the marquee through the building where you want it cut and then enclose the portion of the rest of the building and site.
View in 3D. If you like this, save it as a view and then you it will be available in the future as the design progresses.
From the 3D window you can create the 3D view; again, save it as a view so it is available in future.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"