An annotated timeline is an interactive time series line chart with the option to add annotations. You can display one or more lines on the chart.
The first column in your spreadsheet should contain the date (optionally including the time of day). The following columns should contain numeric values, titles, and annotations. Each numeric column can be followed by one or two optional columns containing text. The values in the numeric column are represented in the Y-axis for the corresponding time in the first column. The text in the first column following a numeric column serves as the titles of your annotations, and the second column with text is the annotation content.
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