How do you switch between 2Ch and MC on hybrids

I have a Denon 3910 DVD player. I was wondering if someone could tell me how I can switch between the 2 Channel layer and the MultiChannel layer on a Hybrid SACD disk. My players seems to default to the Multichannel layer everytime it comes on.
On the 5900, there's a front panel switch for setup of SACDs. Mine, too, defaults to MCH but it can easily be reset to stereo SACD or CD. I imagine the 3910 has a similar switching.

I have the 3910. There's a small round button on the front face to the right. Depending on what mode you have your player default to, pressing this button once more reverts to the other mode.