Step 1: Tap the icon in the toolbar at the bottom of your chart screen. If you don’t see the icon, swipe the toolbar to the left to access more tools.
Step 2: Select the chart type you’d like to modify.
Step 3: Select the items you’d like to modify, such as colours and sizes of different elements within a chart. Go back to your chart, and the new settings will be applied automatically.
If you’d like to reset the chart settings back to default, tap the icon again and then tap ’Rest settings’ in the bottom left corner.