Hot answers tagged office-365
I figured it out, almost by accident. You see how in the original screenshot, the row colors alternate but then stop at row 23. That's because the "table" part of the worksheet only included the top rows, and the filtering only works on those rows. I had to reformat ALL of my data as a table, and now it works. This is really non-obvious.
Wikipedia has a fairly neat comparison of all the various editions and features.
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