Legend settings (Figure 1) allow you to manage the line chart legend (if you choose to display one).
Figure 1: Legend
You display a legend in the chart by setting Show Legend to On (one metric must be selected and a second dimension has been added), and use a scroll by activating Enable scroll in Legend. You can select a Legend Position (Top, Left, Bottom, Right), Align the legend text, set the Legend Font color and the Font Size, and customize a Char limit.
Figure 2 shows a line chart legend being moved to a different position and aligned to a different level.
Figure 2: Example