How do I turn on grammar in Word 2007?

To enable grammar checking in Word 2007, specifically referring to enabling the Grammarly add-in (based on the reference provided), follow these steps:

1. Open Microsoft Word on your computer.
2. Locate the 'Grammarly' tab at the top of the toolbar.
3. Select 'Enable Grammarly' from the drop-down menu.
4. A new window will open up. Enter your credentials and click 'Sign In'.
5. Grammarly will be activated and ready for you to use.

In essence, the reference provided describes how to turn on grammar checking using Grammarly in Word 2007. If you are instead trying to turn on the built-in grammar checking feature within Word 2007, these steps will not apply.