New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 135th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a dynamic range when there are blanks in the data set. Learn also how to use an array formula to find the Last row or column used in a data set.