NX6000D Bridge mode???

On the spec sheets it states that the NX6000D has the following modes:  



  • BRIDGE, DUAL (Dual Mono), STEREO, BIAMP1 or BIAMP2.


I connected to the amp via NXEdit, and the only modes that are being shown is: DUAL (Dual Mono), STEREO, BIAMP1 or BIAMP2.


I went thru the front display and even there the option for Bridge is not shown.


So my question, how do I set this amp in Bridge mode?