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Microsoft Excel offers various linking options to allow you to reference documents, locations or actions in Excel worksheets and vice versa; to link back to the worksheets. Hyperlinks in Excel can be used to open any type of file, navigate to web pages and other cells or sheets in one workbook and to send emails. Formulas, text, shapes, charts, and pictures can be hyperlinked.
Microsoft Excel also allows you to protect workbooks so that other people can open and read them without making any changes, and also protect certain parts of worksheets like formulas so that they cannot be modified.