# 4.5.3 Entering vertical and lateral pitch for thumb

<iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen="allowfullscreen" frameborder="0" height="315" id="bkmrk-" src="https://www.youtube.com/embed/fV6mpL92qgs?si=JWuEWy9rxomxIr_L" title="YouTube video player" width="560"></iframe>

<span style="font-family: monospace; color: #6b7280;">4.5.3</span> <span style="border: 1px solid #d1d5db; color: #4b5563; padding: 2px 8px; border-radius: 3px; font-size: 0.85em;">measurement</span>

Thumb pitch works exactly like finger pitch — you enter it into the **pitch tiles** around the thumb hole, and the tile *is* the direction. There's no direction to select from a dropdown. For the full mechanics of the pitch tiles, see **4.4.3**; for the terminology, see **4.1.4**.

## 🛠️ How the Thumb Pitch Tiles Work

- ✅ **Forward** — points toward the **center of the ball**. Enter forward pitch in the forward tile.
- ✅ **Reverse** — points toward the **outside of the ball**. Enter reverse pitch in the reverse tile.
- ✅ **Lateral** — the **Left** and **Right** tiles, by position.

Forward/reverse and lateral are separate tiles, so the thumb can carry both at once. The thumb and fingers are fitted independently — it's normal to have reverse on the thumb and something different on the fingers.

**Note:** To apply a pitch against a tile's default direction (for example, **Right** pitch on the left-side tile), scroll to the absolute bottom of that tile's drop-down for the cross-direction values listed as `Rx`, where `x` is the desired pitch.

## ⚙️ Thumb Pitch Is Manual

Thumb pitch is manual data entry — there's no automation and no error validation behind these fields. Spectre records exactly what you type.

## 📋 Entering Thumb Pitch

1. In the thumb section, locate the pitch tiles around the thumb hole.
2. Enter the **forward or reverse** value in the correct tile (forward = toward the center of the ball, reverse = toward the outside).
3. Enter the **lateral** value in the **Left** or **Right** tile.
4. Review both before saving.

### Related Sections

- 4.4.5 — Inputting finger pitch (the pitch-tile mechanics)
- 4.1.4 — Pitch terminology: Forward, Reverse, Lateral, Zero
- 4.5.4 — Thumb insert type and size

**Tip:** Because forward points to the center of the ball and reverse to the outside, the sheet layout tells you the direction — no sign convention to memorize. Enter each value in the tile that matches the direction you measured, and read it back since nothing here is validated.