Layout has a significant role in graphic design. It refers to the arrangement of elements on a page. it usually refers to the placement of image, text and style. Understanding the layout of design is very important.
The most commonly used layout is called “the Z layout”. the structure is in the form of the letter Z – the path in which the reader views the elements on the page, ad or design. This ranges from headlines, imagery, body copy, captions and signature. By nature, the human eye will follow this pattern when they look at advertisements or designed layouts.
http://www.designzbyjamz.com/importance-of-layout-in-graphic-design-materials/ – Designz by Jamz – Jamie Hart