You can change a chart from one type to another—for example, from a column chart to a bar chart, or from a 2D chart to a 3D chart.
Tap the chart, tap
, then tap Chart.
Tap Chart Options.
Tap Chart Type, then tap the type of chart you want.
Scroll to see more styles.
If you can’t edit a chart, it may be locked. Unlock it to make changes.