Yes, the legend is used to identify the series in a chart.
The legend identifies patterns used for each series.
Legend.
A legend is used on a chart to identify the series on the chart, such as the particular bars or lines, so the user know what each one represents. Labels are headings on the worksheet itself, or can be data labels which show the actual values on a chart.
A chart legend is used to identify and explain the symbols, colors, or patterns representing different data series or categories within a chart. It provides clarity by helping viewers understand what each element of the chart signifies, ensuring accurate interpretation of the data. Typically placed alongside or within the chart, the legend enhances the overall readability and effectiveness of the visual representation.
The legend tells you what each bar or column or line or pie slice etc. represents on your chart. It is usually colour-coded to help you and has the names beside them that are got from your spreadsheet or just as Series1, Series2 etc., if you did not specify names.
The Legend of Zelda. [It has the same name as its series.]
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The text in the legend comes from the data series, so it can be changed in the series through the Source Data settings. If text headings were selected when making the chart along with the numeric data, they may be used as headings that appear in the legend. So if they are changed on the worksheet, then they will change the text in the chart legend too.
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When heated, each element produces a series of thin colored lines called an emission spectrum. This unique pattern of lines is used to identify the elements present in a sample based on their characteristic wavelengths of light.
The "primary key" is the identifier that database systems use to identify a record uniquely.