The author observes a visual inconsistency in macOS font rendering where the 'Downwards White Arrow' (U+21E9) has different proportions than the 'Upwards White Arrow' (U+21E7), contrary to expectations that they should be identical mirror images. The article serves as a beginner-friendly introduction to how Unicode code points map to rendered glyphs through fonts.
Background
Unicode defines abstract code points but relies on system fonts for visual rendering, meaning the same code point can appear differently across platforms and font implementations.
- Source
- Lobsters
- Published
- Aug 17, 2026 at 09:33 PM
- Score
- 5.0 / 10