In Word 2007 I want to add a new AutoCorrect entry that will replace three lowercase letters with the words they stand for and I want the words to be underlined.

1. On my AutoCorrect screen both of the "replace with" options (Plain text & Formatted text) are greyed-out and Plain text is selected as the default. Why are they greyed-out? How can I get to the Formatted text option? (Without it I can't specify that the replaced words should be underlined.)

2. Is there any way for me to make the replace text (three letters) case sensitive? I want the replacement to take place only if the three letters are lower case.

Thanks!

Peter