Screenshot of the Row Security Rule Drawer in create mode for a role_predicate rule. Right-anchored 720 px drawer. Header "New row-security rule". Body top-half shows: Name field ("EMEA manager scope"); Rule type dropdown set to "role_predicate" with the read-only lock icon after save; Dimension path autocomplete showing "region.region_code" selected and a hint reading "path.segment — last segment becomes the WHERE column on the wrap subquery". Below, the DSL editor textarea is focused with content "dimension_equals('region.region_code', 'EMEA')" and an inline validator chip reading "Valid · 1 dimension referenced". Beneath the editor a cheat-sheet dropdown "Insert form…" with options (dimension_equals, in, and, or, not). Lower half: applies_to_roles chip-input with "region_manager_emea" added (typing a new role adds a chip). Bottom of drawer: is_enabled toggle On, Cancel / Save buttons. Dimensions: 1280x900px. Purpose: show that rule authoring is a structured form and not a free-text SQL editor.