New to Excel? Looking for a tip? How about a tip so mind-blowingly advanced as to qualify as a magic trick? You're in luck. In this Excel tutorial from ExcelIsFun, the 477th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a Gantt cell chart using conditional formatting. This is accomplished with recourse to the WORKDAY.INTL, AND, NOT & NETWORKDAYS.INT functions.