We decided on a odd nubmer for the colums. Two columns of six, again with that extra space to use as a layout element. Willi Kuntz was a big advocate of the 13 column grid, as is Will Hopkins of Hopkins/Baumann who worked with Kuntz.
Why use grids?
Grid structures are vital to successful document design, and especially so for documents containing a mixture of text and graphics. If you don’t believe us, examine a few of those magazines in your doctor’s waiting room. Whatever the subject matter, and no matter how random the layout appears, the underlying structure will generally be based on a carefully designed grid.
Margins and row and column gaps
Besides choosing the number, width, and arrangement of your columns, there are some other important grid elements that you must consider: page margins, and row and column gaps.