---
title: Gizmos
order: 4
---

When a primitive or modifier with a fillet is active, Chisel overlays an arc-and-dot gizmo at the seam. Click-drag the dot to enter the *Adjust Rounding* modal and tune the radius live.

![Gizmo dots overview](../assets/gizmo-dots.webp)

## What gizmos appear

| Object / modifier state | Gizmos shown |
|---|---|
| Primitive with rounding | Arc gizmo on each rounded edge |
| Prism / Trapezoid | Separate gizmos for *Rounding* (rims) and *Bevel* (corner edges) |
| Boolean modifier | Arc gizmo at the boolean seam |
| Mirror modifier (with blend) | Arc gizmo at the mirror plane |
| Array modifier (with smooth) | Arc gizmo between copies |
| Emboss / Engrave | Two gizmos: outer seam and inner corner |
| Ngon primitive (active + selected) | Vertex dots, rounding handles, and edge add-dots |

## Color coding

Gizmo colors identify the operation at a glance:

- **Boolean Difference** — accent red
- **Boolean Union** — accent green
- **Boolean Intersect** — accent blue
- **Emboss / Engrave** — orange / purple
- **Other modifiers** — neutral

Color, dot size, arc geometry, and gap are all configurable in the Theme tab of [Preferences](../preferences.md).

### Rounding gizmo

![Rounding gizmo](../assets/gizmo-rounding.webp)

### Blending gizmo

![Blending gizmo](../assets/gizmo-blending.webp)

## Interaction

Click and drag the gizmo dot to enter the *Adjust Rounding* modal:

- **Drag** — adjust radius
- **Shift** — precision mode
- **Ctrl** — snap to round increments
- **`1`–`5`** — switch profile
- **`S`** — toggle radius ↔ Chamfer Smooth
- **Release** *(when invoked from gizmo)* — confirm
- **Esc / RMB** — cancel

See [Rounding](../rounding-and-blending/rounding.md#adjust-modal-b) and [Blending](../rounding-and-blending/blending.md#adjust-modal-ctrl--b) for the full controls.

## Ngon gizmo

When an [Ngon primitive](../primitives/shapes/ngon.md) is the active, selected object, Chisel draws its polygon outline with an editing gizmo on every point.

![Editing an Ngon in the viewport](../assets/ngon-edit.webp)

| Handle | Action |
|---|---|
| **Vertex dot** | Drag to move that point on the local XY mid-plane. A gray dot marks its original spot and the live outline previews the result while the field catches up |
| **Rounding handle** (orange, offset from the vertex) | Drag along the corner's outward normal to set that corner's rounding |
| **Edge add-dot** (green, appears at an edge midpoint on hover) | Click to insert a new point there |
| **`X` / `Delete`** | While hovering a vertex dot, delete that point (refuses below three points) |

While dragging a rounding handle the status bar offers the same profile keys as the other modals: `1` Round, `2` Sharp, `3` Soft, `4` Tight, `5` Chamfer, and `S` to jump between the corner's rounding and its chamfer smooth. `RMB` / `Esc` cancels.

![Inserting Ngon points on an edge](../assets/ngon-add-points.webp)

The three sub-handles can be toggled independently in the render settings — see [Render Engine: Gizmos](../render-engine/gizmos.md#ngon).

## Multi-modifier gizmos

When an object has several modifiers with fillets (e.g. a Boolean with blend, plus a Mirror with blend), each gizmo sits at its own seam. Click the one you want to adjust — they don't overlap and the modal targets that specific fillet.

## Hiding gizmos

Gizmos respect Blender's overlay toggles. Press `Shift + Alt + Z` to toggle viewport overlays, or use the overlay dropdown in the 3D View header. The arc-and-dot widgets are part of the gizmo overlay group.

## See also

- [Rounding](../rounding-and-blending/rounding.md#adjust-modal-b) and [Blending](../rounding-and-blending/blending.md#adjust-modal-ctrl--b) — full modal controls
- [Preferences](../preferences.md#theme) — gizmo theme colors and sizes
- [Pie Menu](pie-menu.md) — keyboard alternatives for the same operations