File maintenance supports adding, modifying, or deleting records, as well as creating backup copies of the database
<h2>Answer:</h2>
<u>Theme option in the design tab</u>
<h2>Explanation:</h2>
After opening his slides in power point he must click on the Design Tab and then selecting a theme from various options that come in front of him. He can select any theme and then click apply to all. This will allow him to apply the same theme over all his slides of presentation.
Generally invisible to the user, like you can't see it on your OS or in just a standard application
