Excel validation lists avoid blanks and errors with TOCOL(ignore) plus FILTER; the spill range stays stable across worksheets.
How-To Geek on MSN
The game-changing Excel ribbon feature I wish I'd used sooner
Stop hunting through tabs—build a portable custom ribbon containing your favorite commands and Excel's most useful secret tools.
How-To Geek on MSN
3 simple tricks I use to make Excel column charts actually useful
Turn generic columns into custom visuals by adding floating totals, nesting series, and layering simultaneous data labels.
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