Click on Chart-->Sections--and then choose from a variety of chart sections.

As a helpful hint for the user: the chart section will insert into your chart layout on the side where you last had your cursor.

Once a chart section has been inserted, a user can RIGHT click on the top chart section tab, and click "move to next tab group."  This action would take the chart section from the left side of your layout, to the right side of your layout.  If a user wanted to make the chart section a new horizontal tab group, the user would RIGHT click on the chart section tab and choose "new horizontal tab group."