There's still a switch on the remote
http://www.dji.com/product/phantom-3/remote-controller
Has the same letters as the Inspire, so would assume it's the same. - Page 27
http://download.dji-innovations.com/downloads/inspire_1/en/Inspire_1_User_Manual_v1.0_en.pdf
Although it says IOC is activated in this mode, so maybe you can only set 1?