To change the type of a chart, please see steps below for details:
Step 1: Right click anywhere in the chart;
Step 2: Select "Change Chart Type" from the list;
Step 3: In the new window, click the chart type from the left navigation bar, e.g., "Column";
Step 4: Select the chart type you need;
Step 5: Click "OK" at the end.
Alternatively, you can change the type from the commands in the Ribbon with steps below.
Step 1: Click anywhere in the chart;
Step 2: Click the "Insert" Tab from the Ribbon;
Step 3: Select the chart type in the "Charts" section.