Brightness Contrast screen disappeared

When I try to use Image / Adjustment / Brightness Contrast the screen with the sliders does not come up - however the system behaves as if it is in the screen - I think that somehow the screen has either been positioned off my screen or sized so small I cannot see it! - how can I rectify this

thanks in advance

Patrick Tuite

Check the FAQ Mathias Vejerslev, "Dialog box is missing??" #, 15 Oct 2002 3:37 pm </cgi-bin/webx?50> - I think this is what you're after.