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+---
+epic: 10
+story: 10.4
+title: "Answer Column Formatting"
+status: draft
+---
+
+## Epic 10 — Notepad UX (Cross-Platform Spec)
+**Goal:** Consistent editor behavior specified once, implemented per platform.
+
+### Story 10.4: Answer Column Formatting
+
+As a user,
+I want to control how numbers are displayed in the answer column,
+So that results match my preferred notation and precision.
+
+**Acceptance Criteria:**
+
+**Given** a user opens the formatting settings
+**When** they configure global decimal places (0-10), notation (standard, scientific, SI), thousands separator (comma, period, space, none), and currency symbol position (prefix, suffix)
+**Then** all answers in the sheet render according to these settings
+
+**Given** a user right-clicks (or long-presses) on a specific answer
+**When** they select "Format this line" from the context menu
+**Then** they can override the global formatting for that line only
+**And** the per-line override persists when the sheet is saved and reopened
+
+**Given** a global format is set and a per-line override exists
+**When** the sheet is evaluated
+**Then** lines with overrides use their specific formatting
+**And** all other lines use the global formatting
+
+**Given** a user selects "Scientific notation" for a line
+**When** the result is `1500000`
+**Then** the answer column displays `1.5e6` (or `1.5 x 10^6` depending on rendering)
+
+**Given** a user selects "SI notation" for a line
+**When** the result is `1500000`
+**Then** the answer column displays `1.5M`