The author gives his first interview ahead of the Sundance premiere of Alex Gibney’s intimate doc, which reframes his story ...

Freeze results, hide sensitive logic, and boost performance by converting dynamic formulas into static values.

Microsoft is still forcing you to back up your files to the cloud, but recent changes have made it easier to restore your local files. Too bad those changes aren't documented.

A common source of errors in Excel is "the gap"—a situation where you add new data to the bottom of a list, but your formulas ...