After you have enabled the Charts Power-Up and open the Charts Link from your board, you are redirected to New Report automatically. You can also navigate to this page from Your Charts area by clicking the Add Chart button. Find the template you are interested in by keywords or tags, and click on it to proceed.
A Source Configuration popup is shown right after the templates selection. It provides the possibility to configure boards you want to explore visually, and a date range for historical data. Change the source settings if this is required, and click the Create Chart button.
Once data processing is complete, the chart editor will appear. You can modify the default chart settings applied by platform, or simply finalize chart creation by pressing the Finish Setup button.