Casio 3D Glasses YA-G30 User Manual page 16

L/R Swapping
If you feel that the dimensionality of the 3D image appears backwards while viewing with
the 3D glasses, it probably means that the shutter operations of the image and the
glasses are reversed. When this happens, either press the projector's [ENTER] key or
press the on button of the 3D glasses to swap the left and right images with each other
(L/R swapping). This may correct the problem.
For more information about swapping the left and right images on the projector, see the
User's Guide on the CD-ROM that comes with the projector.
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