Page Top Margin

On a basic (blank) page (with image blocks and text), is there a way to adjust the top margin so it starts lower? I don't want to add a spacer block because it's too big.

Alternatively, I could add a margin to the h1, which is at the top of the page. I tried:

h1 {margin-top: 30px;} and h1 {padding-top: 30px;} and neither worked.

Thanks.

I figured it out. The container with the content is called "main", so: