Harry wants to change the background of all of his presentation slides. which slide will enable him to make this change to all the slides at once? harry needs to change to change the background of all his presentation slides.

The answer to the following blank is Theme.

Explanation:

To change themes in powerpoint:

to change your username, you must:

1) make sure what the username you want to change to is allowed in this community

2) contact a administrator (for example, jaysl)

3) through pm, tell the admin what you want to change to

4) if the username is allowed, it will be changed in a matter of seconds (minutes at most)

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what? ? i don't get it