OS X 10.5 now includes the ability to check grammar. Any application that supports Leopard’s Dictionary will also now have the ability to check grammar along with spelling. Here is how to enable this feature…
Leopard’s Dictionary application will now check grammar as well as spelling. This is not on by default, but here is how to enable it.
TextEdit and Safari are good examples program that uses Leopard’s dictionary app.
1. Go to the Edit menu in the program
2. Select Spelling and Grammar
3. Select if you want to Check Grammar with Spelling or if you want to Show Grammar and Spelling window
From within the program, you can ctrl-click (right-click) and select these options as well. This is demonstrated in screen shot below.