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Data -> Data Tools -> Data Validation Adding Data in a Spreadsheet This time sheet is a fast and effective way to record your hours. Suppose you work for the same Accounts every week. What if you could just choose the Account from a list? Choosing the answer from a list has two benefits: the data entry is faster, and it is spelled correctly.   Data Validation restricts what goes into a cell. For example, suppose a spreadsheet had a column for the Date.   If you use Data Validation, Excel would compare what the user types and alert the user if they typed in something wrong, like a price instead of a date. Data Validation can also create a simple drop down List.