How to: Fullwidth content in fullwidth section

Hello

I’m pretty shure this can be done easily with the highend WP Theme but i could not find a way to realize this: How can i put content (Text etc) into a fullwidth section so that it has no margins left (& right)? I created a fullwidth section and added some text, but its aligned to the content area and i could not figure out how to align this text on the very left side of the web page.

My page can be found at http://www.across-the-world.ch/test/archiv/

BR, Simon