Overflows advance width
Auto-fixAudit code: overflows-advance
Definition
The drawn glyph extends past its advance width. Adjacent glyphs will overlap — bump the advance or pull the right edge in.
How Patens surfaces this
The Patens audit module checks for overflows-advance across five teaching surfaces: the edit-panel inline issue list, the
project-wide audit page, the release pre-flight check, the family hub,
and the home-page project tile. Every surface shows the same plain-English
explanation and links back to this page. This rule has a one-click Fix button in
the editor — the audit module both detects the issue and applies a
deterministic correction with a labelled snapshot, so the ⌘Z path back is preserved.
Run this check yourself
Patens runs every audit rule live as you draw — including this one.
The editor (in private alpha) shows overflows-advance firing on real
glyphs, or check your own work from the CLI:
npx patens audit your-project.font.jsonCanonical references
Primary literature where this rule is established or explained. Drawn from the open-licensed corpus — browse the full 42-source canonical library or read the research artifact.
- OpenType Specification 1.9.1 ↗
Microsoft Typography · 1997 · Microsoft Corporation· § Horizontal Metrics Table
Glyph extents that overflow the advance width cause collisions with the next character in tight settings.