in the floor plan window with the marquee in place right-click and check choose the option SHOW SELECTION/MARQUEE IN 3D.
The shortcut keys changed.
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"