Profile Editing — Custom Edge Cross-Sections

Select an extruded 3D shape in the 3D view. In the Inspector sidebar, scroll to the Surface section and click Edit Profile.

The Profile Editor panel opens, showing:

• A 2D curve grid representing the edge cross-section
• The current profile curve (defaults to a straight vertical line — the square edge)
• A set of preset buttons along the top
• A preview of the shape in the 3D viewport updates in real time as you edit

The profile is shown from the perspective of looking along the edge — left is inward (into the extrusion face), right is outward (toward the exterior face), top is the extrusion top, and bottom is the base.

Click any preset button at the top of the Profile Editor to instantly apply that profile to the shape:

• Square — resets to the default straight edge. Use this to clear any custom profile and start fresh.
• Round (Bullnose) — applies a convex quarter-circle curve from the top face down to the exterior side face. Classic for concrete copings and stone walls.
• Chamfer — applies a single angled cut. The angle starts at 45° by default; drag the control point to steepen or shallow the cut.
• Stepped — applies a two-step rebate. Both the depth and height of each step can be adjusted.
• Concave Cove — applies a concave quarter-circle. Classic for decorative planting bed edging and ornamental walls.

Presets give you a starting geometry that you can then fine-tune using the bezier handles.

The profile curve is a bezier spline. To customize it:

Moving control points: Click any square control point on the curve and drag it to reposition. The curve updates in real time. Control points can be placed anywhere within the grid.

Adjusting tangent handles: Each control point has two circular tangent handles (small circles on the arms extending from the point). Drag these to change the curvature of the incoming and outgoing segments:

• Both tangent arms aligned = smooth continuous curve through the point
• Arms pointing in independent directions = a corner or kink at the point

Adding new control points: Click on the curve line (not on an existing control point) to add a new control point at that position. The new point can then be dragged into position.

Deleting a control point: Select a control point and press Delete to remove it. The curve reinterpolates through the remaining points.

After selecting any non-Square preset, an Edge Size field appears below the grid. This controls how far the profile extends inward from the edge — a larger value creates a deeper, more prominent bevel or round. Enter a measurement directly (e.g. "30mm" or "1.5in") using any supported unit format. The 3D view updates as you commit the value with Enter or by clicking away.

Rotate the 3D camera to a low viewing angle to judge the profile clearly — edge treatments are most visible when viewed from the side rather than from above. The cross-section preview at the bottom of the inspector also shows a live diagram of the top surface shape to confirm your settings.

The profile is saved with the shape and persists across sessions. To return to a plain 90° edge, click the Square preset — this clears the profile without deleting the shape or any other settings. To try a different treatment, simply click another preset icon; the Edge Size resets to the new preset's default, which you can then fine-tune.

When you are happy with the result, click Done editing at the bottom of the Extrude inspector, or press Escape. The inspector returns to the standard entity panel. All edge profile settings are saved as part of the drawing and will appear in 3D view, presentation renders, and exported PDFs.