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proximity-data-tables

Use this skill when designing or fixing data tables and tabular layouts — row spacing, column spacing, header treatment, group separators, total rows, sticky headers, dense vs. comfortable variants. Trigger when the user is laying out a table, deciding density, debugging "rows that are hard to follow," picking when to add zebra striping, or arguing for/against borders. Sub-aspect of `proximity`; read that first if you haven't already.

plugins/HDeibler/universal-design-principles/plugins/perception-and-hierarchy-principles/skills/proximity-data-tables/SKILL.md

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Nov 7, 2026
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# Proximity in data tables

Tables stress proximity in two directions at once: rows should read as discrete records (vertical proximity binding cells of the same row, separating them from cells of neighbor rows), and columns should read as semantic groupings (horizontal proximity within a column header, between header and cells). Most table problems are proximity problems disguised as styling problems.

## The two-axis proximity ladder

In a table, you're managing two perpendicular spacing systems:

```
Vertical:
  Inside a row (cell padding)        — ~12-16px
  Between rows                       — ~0 (or thin border for separation)
  Header to first row                — slightly more than between rows
  Footer / total row                 — distinctly more than between rows