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Add PrtSc to the numpad, filling the nav block

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Between Del and PgDn, which makes the nav block a solid 3x2 and leaves the
arrows isolated by a symmetric pair of gaps rather than three asymmetric ones.
26 keys. PrtSc earns a key because it is the screenshot key on every Linux
desktop; Insert, ScrLk and Pause stay on a layer.

Co-Authored-By: Claude Opus 5 <[email protected]>
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William RickertandClaude Opus 5 committed 2026-09-01 10:35:24 -05:00
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commit 04a52b1eea
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README.md
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@@ -41,16 +41,19 @@ either.
|---|---|---|---|
| `Schematics/Left` | 1 | **34** | MCU, matrix, USB-C, SBU split link |
| `Schematics/Right` | 1 | **41** | MCU, matrix, USB-C, SBU split link |
| `Schematics/Numpad` | 1 | **25** (14 numpad + 9 nav + 2 thumb) | MCU, matrix, **CH334R hub**, 3 downstream ports |
| `Schematics/Numpad` | 1 | **26** (14 numpad + 10 nav + 2 thumb) | MCU, matrix, **CH334R hub**, 3 downstream ports |
**Numpad layout is settled** — see `Documents/numpad-layout.svg`, and
`Documents/three-board-overview.svg` for all three at the same scale. Six
columns by five rows, ~114 × 105 mm, **25 keys and no encoder**.
columns by five rows, ~114 × 105 mm, **26 keys and no encoder**.
- **Nav block across the top**: Home/End/PgUp over Del/PgDn, with the arrows in
a standard **inverted-T** isolated below by three empty cells — the same
breathing room a 104 gives them. Del sits two rows above `←` with a gap
between, so the destructive key is never adjacent to the one you hit blind.
- **Nav block across the top**: a solid 3×2 — Home/End/PgUp over Del/PrtSc/PgDn
— with the arrows in a standard **inverted-T** isolated below by a symmetric
pair of empty cells, the same breathing room a 104 gives them. Del sits two
rows above `←` with a gap between, so the destructive key is never adjacent to
the one you hit blind.
- **PrtSc has a real key.** It's the screenshot key on every Linux desktop, so
it earns one. Insert, ScrLk and Pause do not, and stay on a layer.
- **Numpad on the right**: digits in a 3×3 with `0` as a 2u, and `/ * −` in a
right-hand column beside 9/6/3, where a full-size numpad puts its operators.
- **`Enter` (2u) and `+` on a stepped thumb cluster**, spanning exactly the
@@ -61,7 +64,7 @@ columns by five rows, ~114 × 105 mm, **25 keys and no encoder**.
- **No encoder.** Dropped along with the scroll wheel; volume lives on a layer
or on the halves' function row. This makes the numpad a completely plain QMK
keyboard — no encoder, no pointing device, just a matrix. It is the simplest
of the three boards by a distance, and ~$4.11 in parts.
of the three boards by a distance, and ~$4.16 in parts.
Cabling: