Having studied design for a good 2 years now, I think I have a pretty good understanding as to when to choose to implement a 2, 3, 4 or whatever column layout. I ask therefore, how does one go about choosing exactly how many columns they need for a site? Is the grid structure motivated by design? Or, content? Mark Boulton Mark Boulton: Homepage states that; " What isn't so good though is the general lack of understanding of grid systems when perhaps the question on most designers lips when they sit down to begin a design is, 'how many columns should I have'. This is not grid system design." Is Mark right in saying that there must be a complete reasoning (discarding visual appeal) behind deciding the number of columns one needs or wants in a site?