Explanation

The shortcut key to change case in MS-Word is: Shift + F3

1. Sentence Case
2. Lowercase
3. Uppercase
4. Title Case
5. Toggle Case

Explanation

Ctrl + W is a shortcut key to close a document in MS Word.

Additional Information:

Explanation

Microsoft was founded on April 4, 1975.

It was founded by Bill Gates and Paul Allen in Albuquerque, New Mexico.

Explanation

You can save the document in Microsoft Word in three ways:

1. You can save by clicking File on the top left corner 
2. You can also save by just pressing ctrl + S 
3. Just press F12

Explanation

Mail Merge in MS Word is used to create personalized documents (like letters or emails) for multiple recipients using a data source.

It inserts individual names, addresses, or other details into a template for mass communication.