You can add your own custom php or html coding using the Ad(d)s section in your Admin Panel.  Please refer to the "Adding Google Ads, You Tube Videos, Gym Chat Videos/Media Feeds, Google Analytics, and other Plugins" article, except instead of inputting your embed code, input any php or html code you want!

You can also add php coding directly on the page text editor box on the Add/Edit Pages by using "## php" and "php ##" for the end tags (without the quotes and no spaces).

To add custom CSS styling to your pages / page sections, go to the Configure Site > Styles Manager Tab on your Admin Panel.  On that page, click on the pink "Expand" tab for any section you want to add the CSS code to, and then input it in the text box that expands out.  When you're done, just click on the Save button at the bottom of the page.

If you would like to edit the html of your page text directly, on the editor box, click on the HTML button for the pop-up overlay of the HTML Editor.