Highlight your text and at the bottom of the page you will see the properties of it, choose colour, size, style and font.

Full page Options:

At the bottom of your Dreamweaver you can see a link in Properties to Page Properties..

When you click it you will see this page:

You can choose your page font:

Choose your page options, ive chosen my text options and a website background of green. When you click OK your webpage will now have these options.

If you would like more help with this tutorial please register and visit the forum.