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18. Formatting and Perfecting Charts > Improving Your Charts
So far, you've learned the key techniques you need to make sure your charts tell the right story. However, Excel lets you do plenty more, including adding trendlines, data tables, and error bars, and tweaking 3-D perspective and shapes. In the following sections, you'll learn even more about how to make the perfect chart.
Many people don't think twice about the scale they use when they create a chart—instead, they let Excel set it automatically based on the values their chart has been built from. There's nothing wrong with this laissez-faire approach, but if you know how to take control of your chart's scale, you can make important data stand out and make it easier for people looking at your chart to spot relative differences in data and understand overall trends.
