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Take note of the users “handle”.
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At the top right, on the toolbar, click your avatar.
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Choose “Preferences” from the popup menu.
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Scroll down to the bottom.
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Click in the field labeled “Users Muted”, and type the first character of the user’s handle.
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Either choose the user from the popup user list, or type the rest of the user’s handle.
- Click the “Save Changes” button.