Replace legacy formulas with MAP, BYROW, BYCOL, SCAN, and REDUCE to build secure, scalable, and automated spreadsheets.

Stop sacrificing screen space—Excel tables, Watch Window, Focus Cell, and split views keep context without locking rows.

Dana Milbank is a Futures columnist for The Washington Post, writing weekly about our attempts to "rehumanize" during a time of anxiety and isolation. He is also the author of five books on politics, ...