One of the more embarrassing things that can happen to a presenter is to have unwanted notifications appear on the screen while you are showing a PowerPoint or video. To fix that problem you can learn to adjust your Mac OS X Notifications. You can use the Do Not Disturb to temporary disable notifications, or dive into the Notification Menu and make all the awesome adjustments that you could ever want.
Watch the brief YouTube tutorial below to see how you can use the Do Not Disturb feature or edit your Notifications.
This blog contains information on Mac OS X and related programs.