I am creating a spreadsheet based on an analytical test method. The value with error is 12.5±10% m.g. or 11.25-13.75 m.g. I need the cell to display a red "X" to the right of the value when the it is not in the range and a green check mark when the value is in the range. And/or how do you make a dialogue box appear when a value is entered not in the range. Thanks.
Bookmarks