I did notice the power button when pressed again, cycles through some lens shifts .. 1 is not 3D, 1 is 3D flipped, and another click makes it another 3D with less depth .. now the funny thing is .. the 1st click that gets you into 3D is the true 3D, anything else after that is less 3D .. and if the 1st click doesn't get the left/right lens sync right .. you'll have to use the projector menu .. so that's not much help! .. so i think they just got rid off that in ZD201 altogether ..
I know this thread is old, but no one corrected this post. The ZD101's can do 2D conversion, that is what the poster above is describing (incorrectly). After first powering on the ZD101's go into 3D mode, click the power button again and it goes in to Left frame only, click the button again and it goes to right frame only. This allows simulview / dualview / 3D-2D conversion. I use it to allow multiplayer games on the same screen with 100% of the screen useable by both players, works very well.