How to Replace Duplicate Letters in Excel. Using the find and replace ability in Microsoft Excel 2010, you can quickly replace duplicate letters, words and cells in a spreadsheet document of any size.

If you want to change the text case from lowercase to uppercase in Microsoft Excel, then this guide shows you five ways to do it.

It's easy to return random values in Microsoft Excel, but returning random letters might leave you scratching your head. Fortunately, you only need two functions.