In the spreadsheet I use (Excel 2010 on a Win 7 machine) there is a production page open all day, and a maintenance page that monitors when a tool needs to be changed. When an alert to change tool comes up, a cell in the maintenance page flashes that message, but because I am usually in the other page I don't see that. I would like the bottom tab of the maintenance page to flash a bright color so I know to go to it to see which tool needs replacing. I have limited Excel knowledge and am pretty sure it would require VB code. Can someone help me out? Thanks.