Measurements — outlier marker

Enable Grid-Sight, then click the ! lozenge on the Latency header to flag cells beyond a threshold. Clicking cycles 2σ → 1σ → 3σ → off. Marked cells show a dashed ring and a value/mean/σ tooltip on hover or keyboard focus. The active lozenge exposes a “show list” affordance (or press Shift+Enter).

Reading the lozenge: the digit is the σ (standard-deviation) cut-off, not a step counter. Clicking cycles 2σ → 1σ → 3σ → off, starting at the default 2σ (the textbook “unusual” threshold). A cell flags only when its value is more than that many standard deviations from the column mean.

Lower σ = more sensitive = more cells; higher σ = stricter = fewer. So you see the most cells at 1σ and the fewest at 3σ — not the other way round. On Latency the biggest spike (200) is only ≈ 2.5σ from the mean, so it flags at 2σ (1 cell) and 1σ (5 cells) but not at 3σ — nothing in this column is that extreme, so 3σ correctly marks nothing.

The Baseline column is all-equal (σ = 0) so its lozenge is inert. Notes is non-numeric, so no outlier lozenge is offered.