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To access Contact Attributes click your user name at the top right of the page, and click the Settings option.
You can change the Sort Order by clicking the Sort By Name button, or search for a particular Attribute by entering keywords in the search box and clicking the search button.
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The Attribute fields will be displayed and can be edited as part of a Student record:
When you create a new Parent Slip the Contact Attributes will be designated by an icon, to distinguish them from Student Attributes: