If you format a document with columns (as in some newsletter layouts), the text will automatically flow from one column to the other. You can insert your own column breaks for more control over the document format.
Place your cursor where you want the column to break.
Click Layout > Breaks.
In Word 2013 or Word 2010, click Page Layout > Breaks.
A menu with options will appear. Click Column.
A column break is inserted. Click Home > Show/Hide to see it.
Tip: The keyboard shortcut Ctrl+Shift+Enter also inserts a column break where you’ve placed your cursor.