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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

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

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:

Troubleshooting

The structure has no geometry to scan. Draw or import some in Geometry.
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).
Lower Minimum area (m²), change the range, or raise Close gaps up to (m).
Lower Interior padding (m) under Advanced.
Change Z1 · start (m) and Z2 · end (m).
Swap the two heights.
Raise Group details (m) under Advanced.