I have black bars on the right and bottom of my display!

I'm running my laptop's VGA output to an recognized as a

It is 20", but the assumed 3" difference does not account for the incorrect position.

Everything displays fine. It runs high-res video beautifully.

But it's 3/4" offset left and an unreasonably annoying 1/4" offset up.

I've tried going through the display's annoying & useless menu, but it doesn't have any way to adjust the position.

I'm certainly no linux newbie, but on this Ubuntu (Pangolin, BTW) I can't figure out how to make simple positional display changes on Ubuntu. It's not only frustrating, it's a bit humiliating!

So.

Does anyone know of an app that will allow me to make basic display position alterations?

("App" - annoyingly trendy, but a useful word - no matter how grating.)

Thanks, & Cheers, Paz