Altitude Pro is a Genesis child theme from StudioPress.
It’s what I have called a storyboard theme, where the content on the home page is expressed as a series of wide, edge-to-edge horizontal sections that you can fill with any type of content you like.
However, one Apprentice member said he thought that the content area on Altitude Pro was too wide, making it hard to read. One way to mitigate this is to increase the default font size. I think this would improve readability.
Alternatively you can change the CSS to make the content area a little narrower. The video explains how to do this.