> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rageon.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Marks

> Drop points, rulers, and outlines as reference in the scene, and generate the outline of an interior from its geometry.

Marks are reference shapes in meters that you place to measure and line things up. They are fixed to world coordinates and saved with the structure. The **Marks (N)** section sits at the bottom of **Structure details**.

![Marks section with New point, New ruler, New outline, and Interior outline, and an outline being drawn in the scene](https://mintcdn.com/rageon/_nzjx4zmIQAxf8Hl/images/structures/structures-marks.webp?fit=max\&auto=format\&n=_nzjx4zmIQAxf8Hl\&q=85\&s=178ab4b43628dc9523b1492eec3d992b)

Drawing a new outline on the side of a building.

## Draw a mark

Click **New point**, **New ruler**, or **New outline**, then click in the scene. A small card shows **Color** and **Cancel**. For an outline it also has **Done** (at least 2 points) and **Close outline** (at least 3).

Each mark gets its own section with a name, **Color**, **Hide behind objects**, its coordinates, and its measurement. **Hide behind objects** decides whether the mark shows through objects or respects scene depth. Outlines also have **Closed outline**.

## Interior outline

**Interior outline** proposes closed outlines from your editable geometry. Use it to get the outline of an interior built from geometry objects.

**1. Open the generator**

Click **Interior outline** and choose **Geometry**: **All editable geometry** or one object. It starts on the first object in the list.

![Interior outline generator with Geometry, Z1 start, Z2 end, Advanced, Color, Interior, and Create outlines](https://mintcdn.com/rageon/_nzjx4zmIQAxf8Hl/images/structures/structures-interior-outline.webp?fit=max\&auto=format\&n=_nzjx4zmIQAxf8Hl\&q=85\&s=f8e40a016047e0d9229f89f9be5e9c81)

The generator with a height range and one detected interior.

**2. Set the height range**

**Z1 · start (m)** and **Z2 · end (m)** are the heights Rageon scans for a closed interior. Pick a range between the floor and the ceiling. The pipette (**Take the height from the view**) reads a height from the scene.

**3. Check the preview**

The outline is drawn in the view. If more than one interior is found, **Interior** switches between them (**Interior 1 · 24 m²**) or shows **All interiors**. **Frame preview** looks at the result.

**4. Create the outlines**

Click **Create outlines** to keep them as marks. **Cancel** discards the preview.

Open **Advanced** when the result is wrong:

| Option | What it does | Default |
| - | - | - |
| **Close gaps up to (m)** | Ignores small voids between pieces of geometry. | 0 |
| **Interior padding (m)** | Pulls the outline in from the walls by this distance. | 0 |
| **Group details (m)** | Groups protrusions and moldings up to this depth into the same face. Larger ones stay as separate faces. | 0.25 |
| **Minimum area (m²)** | Drops interiors smaller than this. | 1 |

## Troubleshooting

> **Add editable geometry to generate the outline.**
>
> The structure has no geometry to scan. Draw or import some in [Geometry](/projects/structures/geometry.md).

> **No closed interior in this range. Avoid floor and ceiling or adjust Close gaps.**
>
> The height range hits the floor or ceiling. Move **Z1 · start (m)** and **Z2 · end (m)** between them, or raise **Close gaps up to (m)**.

> **No interior meets the minimum area. Adjust the area, the height range or Close gaps.**
>
> Lower **Minimum area (m²)**, change the range, or raise **Close gaps up to (m)**.

> **The padding eliminates the interior. Reduce the value.**
>
> Lower **Interior padding (m)** under **Advanced**.

> **Couldn't calculate the outline. Try another height range.**
>
> Change **Z1 · start (m)** and **Z2 · end (m)**.

> **Z2 must be greater than Z1. Enter valid heights.**
>
> Swap the two heights.

> **Could not separate the faces. Adjust Group details to gather moldings and protrusions.**
>
> Raise **Group details (m)** under **Advanced**.


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