Website Design

[Flow]

I have designed my site with Frontpage. It's been up on the net for a while.

Today I was redesigning the homepage and I noticed that the page not just fits my 17 inch monitor but 17 inch x 10- something like 170 inch now. I must have hit the wrong button somewhere. I don't want to upload the page because it's 10 times it's normal size. The layout, grapics and text are the same it's just the page that has increased in size. Does anyone know how to decrease the size of my homepage and get it back to its normal size?

Thanks