At the top of your dashboard, click the module access icon > Academics > Library > Book renewal to open the Book renewal page.
In the Book Number/Barcode field, enter the book number of the issued book or scan the book’s barcode and then click the Search button.
Click on the book’s title. The details of borrowed book is displayed.
Change the due date of the book.
Click the Renew button
For more information, view this: