Block bad data, duplicates, and incorrect dates with these custom rules.

Locking cells in a Microsoft Excel spreadsheet is a super useful thing to know how to do. It’s used to protect a certain segment or an entire worksheet from being modified by anyone other than the ...

Have you ever carefully crafted a formula in Excel, only to watch it unravel into chaos the moment you copy it across columns? It’s a maddening quirk of Excel tables—structured references that seem to ...

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