You can manage favourites by clicking the ‘Manage favourite’ button on top left corner of the document library.
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Select the folder(s), document(s) you need to manage by ticking the checkbox in the first column.
Click ‘Add Favourites’ button at top right corner to select folder(s)/ document(s) to make self favourite or mandatory favourites.
Click on the ‘Pencil’ icon on a row to select/ remove personnel (including self) for the favourite folder(s)/ document(s).