1. The Legend properties enables user to make legend visible on widget which can be done by clicking on the enable legend option, once legend is enabled no repeat option appears as shown in the figure below:

2. No-Repeat option is visible in above figure, It hides the repeated legends, the repeated legends appear when user uses value grouping in the general tab of the chart.

3. The Legend properties doesn’t work untill user Enables the legend from Legend properties.