When you and your colleagues share the responsibility for creating a workbook, you might want to add comments to some cells to suggest modifications to a formula, to ask whether a cell’s contents might be formatted differently, or to provide an updated value for a workbook’s owner to add after they verify the data. Excel 2007 marks cells with comments by placing a red flag at the top right corner, making it easy for you and your colleagues to identify which cells have additional information available. For example, you could add a comment to a sales worksheet explaining that two exceptionally large purchases pushed one hour’s sales way beyond the norm.
By default, Excel displays the red flag at the top right corner of only cells that contain comments. If you want a cell’s comments to be shown the entire time your workbook is open, right-click the cell with the comment and then click Show/Hide Comments from the shortcut menu. If a cell’s comments are shown the entire time, you can return to just the indicator by right-clicking the cell and then clicking Hide Comment.
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