Setting the maximum number of items in a legend
Use the Maximum items in legend property to specify the maximum number of items to appear in a legend for a visualization that supports this property.
You can set a value between 100 and 1000. Values below 100 are automatically set to 100. Values above 1000 are automatically set to 1000.
This property is available in dashboards and reports for the following visualizations: bar, area, line, bubble, bullet, bar and line, dual line, pie, treemap, and waterfall. In combined visualizations, such as dual line or bar and line, the property applies to the legends of both visualizations.
In dashboards, set the Maximum items in legend property by using a slider.
In reports, you must type the value.
For more information, see Working with the legend (dashboards) and Customizing the chart legend (reports).