Chisel
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Gizmos

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

What gizmos appear

Object / modifier stateGizmos shown
Primitive with roundingArc gizmo on each rounded edge
Prism / TrapezoidSeparate gizmos for Rounding (rims) and Bevel (corner edges)
Boolean modifierArc gizmo at the boolean seam
Mirror modifier (with blend)Arc gizmo at the mirror plane
Array modifier (with smooth)Arc gizmo between copies
Emboss / EngraveTwo 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.

Rounding gizmo

Rounding gizmo

Blending gizmo

Blending gizmo

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 and Blending for the full controls.

Ngon gizmo

When an Ngon primitive is the active, selected object, Chisel draws its polygon outline with an editing gizmo on every point.

Editing an Ngon in the viewport

HandleAction
Vertex dotDrag 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 / DeleteWhile 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

The three sub-handles can be toggled independently in the render settings — see Render Engine: Gizmos.

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