These options decide the placement and visibility of the chart legend. Legend Alignment and Max lines are also configurable.
Pie/Doughnut
Line Series Charts
Bar, Column, Combo, and Area Charts
Scatter and Bubble Chart
None: No legend appears
Right: Legend appears on the Right.
Bottom: Legend appears on the bottom.
Top: Legend appears on the top.
Alignment: Sets the alignment of the legend relative to the selected position.
Max lines: Sets the number of lines used by the legend. If the number of series requires more lines, hidden items can be displayed by clicking the < and > arrows.
Enjoy reading the guide? I have explained every chart available in the new Data Studio Book here. Visual explanations for graphs configurations, style, format, and recommendations. So you can also see how the final result will look and why one design is better than others for the same chart.