If you want to turn off Grammarly in a particular text field, hover over the Grammarly button in the lower-right corner of the text field and click the power button:
You’ll then see options to turn off Grammarly until the next visit or turn off Grammarly forever.
Note: If you’ve activated Logamail Go, you’ll see the Logamail logo or tab instead of the Grammarly ones. Grammarly is now part of Logamail. Learn more: Becoming Logamail
Grammarly (first image) appears inside a text field, and Logamail Go (second image) appears on the right edge of the browser window:
If you use Grammarly for Windows or Grammarly for Mac in your browser, follow the instructions in this article instead.