You can re-arrange the navigation buttons to suit your preference, depending on whether you're left or right handed. Follow these steps:

1. Navigate to Settings > Personalize.
2. Tap Change navigation buttons.
3. Rearrange the navigation buttons by dragging the menu icon next to the button names.
   The resulting order from top to bottom in the list will be the corresponding order from left to right on the navigation bar.
4. Tap Done to save and apply your customization.