To add text to a chart that is separate from the text in chart titles or labels, you can insert a text box on the chart. You can then enter the text that you want.

If your chart contains chart titles (ie. the name of the chart) or axis titles (the titles shown on the x, y or z axis of a chart) and data labels (which provide further detail on a particular data point on the chart), you can edit those titles and labels.

Add alt text to a chart. Select the entire chart. Do one of the following: Select Format > Alt Text. Right-click the chart, and select Edit Alt Text. In the Alt Text pane, enter alt text describing the chart. Want more? Make your Excel documents accessible for people with disabilities. Create a new Office file using a template. Save a file ...

Add data labels to a chart. Click the data series or chart. To label one data point, after clicking the series, click that data point. In the upper right corner, next to the chart, click Add Chart Element > Data Labels. To change the location, click the arrow, and choose an option.

Learn how to add a legend to a chart, retrieve a missing legend, and adjust its settings. Add, edit, or remove a chart legend in Excel.

Learn how to create a chart in Excel and add a trendline. Visualize your data with a column, bar, pie, line, or scatter chart (or graph) in Office.

To easily update a chart or axis title, label, or text box that you have added to a chart, you can link it to a worksheet cell. Changes that you make to the data in that worksheet cell will automatically appear in the chart.

You can change the position of the legend and customize its colors and fonts. You can also edit the text in the legend and change the order of the entries in the legend. On the View menu, click Print Layout. Click the chart, and then click the Chart Design tab. Click Add Chart Element > …

Change the text and format of category axis labels and the number format of value axis labels in your chart (graph).

Change the text and format of category axis labels and the number format of value axis labels in your chart (graph in Office 2016 for Windows. You can also set other options in the Format Axis task pane.