What is 2 column format?
A two-column bulleted list is a formatting option when creating a Microsoft Word document that allows you to include two parallel sections on the same page. Using a two-column list can help with organization or increase the amount of information on the page.
Why are papers in 2 columns?
Two columns makes it easier to have short lines, without resorting to small paper size, large font sizes, or huge margins. Thus you still get a high density of text per page, and it keeps page counts down (and the associated costs).