Projector is not projecting in straight lines

[reminder]

I have just bought a used Toshiba projector on Ebay.

There is a problem. The projector is projecting a diagonal picture on the screen. The projector is not projecting in straight lines.

Is there anything I can do to get the picture in straight lines?

regards

[reminder]

I am sure someone will have some advice to share

[dodgy368]

What's the model number?

[reminder]

its Toshiba TDP-S25

[dodgy368]

Think that's in the settings on your projector cos it's supposed to be able to do that, if you haven't got the manual, you can download it from here.
http://www.toshiba.de/Projektoren/resources/pdf/manual_s25sc25_e.pdf