Chart Legend Component

B.

The correct answer is B. apex:legend.

In Salesforce, a chart legend is a visual component that displays the meaning of the different colors, patterns, or symbols used to represent the data series in a chart. By default, the legend is displayed at the bottom of the chart, and its content is generated automatically based on the series labels and colors.

The apex:legend component is a custom component that allows developers to modify the default behavior and appearance of the chart legend. It can be used within an apex:chart component, which defines the data and layout of the chart, and provides access to various chart-related attributes.

Some of the additional configuration options that can be specified by the apex:legend component include:

• Position: The location of the legend relative to the chart, such as top, bottom, left, or right.
• Orientation: The direction in which the legend items are arranged, such as horizontal or vertical.
• Label formatting: The format and style of the legend labels, such as font size, color, and alignment.
• Item styling: The appearance and behavior of the individual legend items, such as shape, size, and clickability.

Here's an example of how the apex:legend component can be used to customize a chart legend:

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<apex:chart height="300" width="500" data="{!chartData}">   <apex:legend position="bottom" orientation="horizontal" fontSize="12"/>   <apex:axis type="Numeric" position="left" fields="data1" grid="true" minimum="0"/>   <apex:axis type="Category" position="bottom" fields="name" labelRotation="45"/>   <apex:barSeries axis="left" xField="name" yField="data1"/> </apex:chart> 

In this example, the apex:legend component is used to set the position of the legend to the bottom and the orientation to horizontal, as well as the font size to 12. The apex:chart component contains other elements that define the data and layout of the chart, including an apex:axis component for the x and y axes, and an apex:barSeries component for the chart series.

The other answer options (A. apex:dataTable, C. apex:pageBlockSectionItem, and D. apex:inputSecret) are not related to chart legends and are not applicable in this context.