[vidmarc]

I've got my projector ceiling mounted but my problem is that the bottom of the projected image is slightly slanting up to the left. Is this an alignment problem of some sort? If I move the bottom left hand corner of the screen slightly forward it straightens out, yet the screen is hanging freely so I can only assume it to be some sort of alignment problem with the projector itself.

Is there a way to correctly ensure that the projector is fixed dead centre to the screen?

[IWC Dopplel]

You will need to measure accurately and triangulate to make sure the screen is flat and the lense is as central as possible

The best method will depend on your projector