Screenshot of the Measure form in Model Builder with Measure type set to "Calculated". Right-anchored 720 px drawer. Header reads "New measure" with a "Calculated" segmented-control pill highlighted next to "Standard". Body shows: Name field ("gross_margin_pct"), Display name field ("Gross margin %"), Expression textarea containing `safe_div(measure("gross_margin"), measure("net_sales"))` with referenced-measure chips underneath labelled "gross_margin" and "net_sales" (both green — resolved); a Calc aggregation mode dropdown set to "expression_as_written" with a hint sub-label "Evaluate once on aggregated values (overall ratio)"; a Format dropdown set to "percent_2dp". A green validation pill sits above the Save button reading "Expression valid · 2 referenced measures". Footer: Cancel (left, text), Save (right, filled). Behind the drawer the Measures panel is visible with existing measures listed. Dimensions: 1280x800px. Purpose: show the analyst exactly what a good calculated measure entry looks like, including the resolved-chips feedback that confirms the reference names were found.