Unchecked Automatic Kerning Harms Typographic Legibility

Published on January 05, 2026 | Translated from Spanish
Visual example comparing a block of text with faulty automatic kerning, showing gaps and crowding, against the same text with optimal manual optical and uniform spacing.

Automatic kerning without review harms typographic legibility

Many graphic design tools apply a default automatic kerning that often fails to calculate the distance between specific letter pairs correctly. Combinations like AV or To can end up too tight or excessively open. These misalignments create irregularities that the human eye perceives as interruptions in the text flow, making reading less fluid and tiring the eyes. For a professional project, overlooking this detail undermines the work's credibility, as typography is the first layer of communication. 👁️

The expert eye identifies spacing errors instantly

A person trained in typography immediately recognizes when letter spacing fails. Poor kerning produces an uneven visual texture in paragraphs, with areas where glyphs crowd together and others where there seems to be excess air. This issue not only bothers when trying to read but also conveys a sense of disorder and lack of care. Manually correcting these problematic pairs is a fundamental step to refine any composition and ensure it looks like a coherent and balanced unit.

Consequences of poor kerning:
  • Creates visual gaps or blotches that break the uniformity of the text block.
  • Interrupts the reading rhythm, forcing the eye to make unnecessary pauses.
  • Gives the impression of careless and unprofessional work.
Letters, like good neighbors, need their personal space to coexist in harmony. A beginner designer thinks that choosing a font is all there is to it.

Reviewing and adjusting manually is the key to polished text

Relying solely on the software's predefined values is a common mistake. The effective solution involves dedicating time to examine and modify the kerning, especially in headings, logos, and prominent texts. This manual process allows adapting the space to the unique shape of each letter, achieving an optical separation that the algorithm cannot replicate. By making these adjustments, distractions are eliminated, the text gains clarity, and the message is conveyed more effectively. It is a detail that separates amateur work from one executed with rigor.

Steps to improve kerning:
  • Review headlines and key phrases visually for tight or loose pairs.
  • Adjust the space between those specific letters manually to balance visual density.
  • Ensure that the spacing is uniform throughout the text block, creating a homogeneous texture.

The difference between automatic and optical

Automatic kerning is a useful approximation, but it is not infallible. Blindly trusting it exposes the algorithm's limitations compared to human perception. Investing effort in manual adjustment is not a waste of time, but an investment in the final quality. Text with optimal spacing not only reads better but also projects professionalism and attention to detail, elements crucial in any design piece aspiring to communicate successfully. ✨