The Load tab on your activity summary allows you to quickly see a snap shot of your performance load metrics at the time of your activity. The date of your activity will be highlighted on the chart by a dotted vertical line. Additionally, you can view your CTL, ATL, and other metrics for any day in range by dragging your cursor across the chart.
To customize this view of your load chart, click the menu button in the upper left. Displayed items, colors, and other visual aspects of the graph can be configured from this menu, as well as adding additional items such as peak power or HR achievements onto the graph.