The Chart Area is essentially the entire area that encompasses your chart. Everything on the chart is placed atop this area — thus you can say that the Chart Area is that part of your chart that’s placed below all other chart elements. By default, the Chart Area doesn’t show any fill or any formatting unless you have used a particular Chart Style. Even though this default status works well, you can opt to format as required. You can change the appearance of the Chart Area, or make the entire chart text use a single font attribute, or change the position of the chart on the slide with just a few clicks.
Learn about Chart Area in PowerPoint 2011 for Mac.

