For better readability, you can activate the "high contrast text" function in the user guides on the Oppo Smartphone.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  Additional settings
Step 3:  Tap on  Accessibility
Step 4:  Enable or Disable  High contrast text
  1. Open the Settings
  2. Tap on Additional settings
  3. Tap on Accessibility
  4. Enable or Disable High contrast text

Oppo Instructions
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