[SOLVED] Editing Html Codes for Page Body?

I'm confused. When I visualize my website using Firebug and it shows the html code. I can then edit the html to make it look like I desire but it doesn't, of course, save the action.

Where do I go on my Wordpress and Theme to find the actual html code for editing? I know where the CSS files are and the code exist for Php files in my File Manger and cPanel.

The real question making me crazy right now is where do I find the Page Setup code that establishes the parameters of my Center Page in my WP Visual Editor? I would really like to raise my h1 title up about three or four hard returns.

I can't tell you how much time I've spent trying to find my answer and trial and error hunting around the Theme Attributes control panel.