A set of guidelines, able to be seen in the design process and invisible to the end-user/audience, for aligning and repeating elements on a page. A page layout may or may not stay within those guidelines, depending on how much repetition or variety the design style in the series calls for. Grids are meant to be flexible. Using a grid to lay out elements on the page may require just as much or more graphic design skill than that which was required to design the grid. Compare to template.