How to change the theme of Apple's mobile phone?

The steps to change the theme of Apple's mobile phone are as follows:

1. Click "Settings" to enter.

2. Click "General" to enter.

3. Click "Accessibility".

4. Slide down to find "Subtitles and Close Subtitles" and click.

5. Click Style to change the theme font.

6. Return to the original layer and click "Wallpaper" to replace the new theme wallpaper.