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Once the add-on is installed, Mentions and Associations will appear as Content Byline items on the top of every page:
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When Mentions is clicked, a pop-up menu will show every Salesforce Object on this page:
When Associations is clicked, a pop-up menu will appear with Associations in Salesforce to this page:
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You may also remove the association of this page from a Salesforce Case by clicking the small x next to each item:
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