If you need help reading text on a screen, you can turn on accessibility settings for a few Google products in your Google Account.
Turn screen reader on or off
The screen reader setting applies only to Google Docs, Sheets, Slides, Forms, and Drawings on a browser, like Chrome. When you use these products, a screen reader can read text on your screen aloud.
For this setting to work, you need to have a screen reader, like NVDA, JAWS, VoiceOver, or ChromeVox.
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Open your device's Settings app and tap Google
Your name
Manage your Google Account.
- At the top, tap Personal info.
- Under "General preferences for the web," tap Accessibility.
- Turn Screen reader on or off.
Your name 
Manage your Google Account.You might need to follow extra steps to set up your screen reader for Google Docs, Sheets, Slides, Forms, and Drawings.
Turn high-contrast colors on or off
The high-contrast colors setting applies only to Google Voice, the Google Developers site, and other developer documentation sites on a browser, like Chrome. On these sites, high-contrast colors can help screen text stand out more clearly.
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Open your device's Settings app and tap Google
- At the top, tap Personal info.
- Under "General preferences for the web," tap Accessibility.
- Turn High-contrast colors on or off.