hello. My name is***** can help you with your question.
There is no option on this model to invert the picture so you would have to mounted the same way you would if it were mounted up right. The only place you can possibly invert the image would be on the source – but the lens in this case will probably not project an image that appears square. Normally, the projector must be mounted so that the center of the lens lines up with either the top or the bottom. If this is not possible, you may be able to correct it by using the Keystone adjustment. Please let me know if you still have questions.