The W3C insists in many of its articles that pages should be laid out using CSS positioning. This is a task that the users of many visual editors find hard to do to any extent as their software does not fully support this method of working.
In Dreamweaver it is only possible to position a <div> container using absolute positioning aligned from the top or the left. Dreamweaver is unable to render relative positioned containers or containers aligned right or use units of measurement other than pixels. Therefore it subtlety discourages users from creating content that it is unable to render. This tutorial is designed to explore some of the other possibilities.
Most of the options are relatively straight forward such as right versus left aligned. Some options such as float and absolute versus relative positioning are more complex.