Generally speaking, people may protect one important document or file by giving a password for it, especially some important or secret files. For office workers, they often record important data in Excel. Therefore, they need to know clearly about how to protect Excel file.

There are several methods to protect Excel file. We can lock the whole worksheet to prevent others from opening or editing it. Also, we can just protect specified Excel rangeor cells.

Firstly, I want to talk somethi...