Sometimes you want to keep the SalesScreen browser window open, but mute the sound that plays when a notification comes in. This is how you do it.

1. Open the notification window by clicking the bell icon in the upper right corner
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2. The notification window has a small speaker icon at the top. If you click it, you can toggle between two different states:
​    a) Green: A short bop sound will play when notifications are received
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    b) Red: Notifications will appear without any sound playing.