The button for camera mode when u change to 2 or 3d is the button loose. Like Wen it on 3d or 2d mode is it loose or tight like it doesn't move. Sorry I have bad ocd. Real bad
Mine is pretty tight, impossible to do accidentally, requires considerable direct force to "switch" (which is good because I never take mine off of 3d)
If you are asking can the button by itself change from 2D to 3D, than no. I don't know about everyone else's 3VO, but mine can't do that 100%. I have to forcefully change it myself.