---
title: "Basic Tutorial | Sections and Polylines"
slug: "cyclone-3dr-sections-and-polylines"
updated: 2026-08-04T15:21:13Z
published: 2026-09-07T11:52:00Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-sections-and-polylines"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://rcdocs.leica-geosystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Basic Tutorial | Sections and Polylines

See the section [Polyline](/v1/docs/cyclone-3dr-polyline) to know how to create a polyline manually.

- [Basic Tutorial | Create sections](/v1/docs/cyclone-3dr-create-sections)
- [Basic Tutorial | Edit polylines](/v1/docs/cyclone-3dr-manage-polylines)
- [Basic Tutorial | Break line (Feature line) and sharp edge reconstruction](/v1/docs/cyclone-3dr-feature-border-fictive-lines)
- [Basic Tutorial | Polyline extraction](/v1/docs/cyclone-3dr-neutral-axis)

In the Extract menu, you can use some other tools that are not detailed in this Guide, but you can refer to the Help files:

- [Join 2 Polylines](/v1/docs/cyclone-3dr-joinpolylinesc): to compute a curve to link the extremities of two polylines
- [Extract All Holes and Borders](/v1/docs/cyclone-3dr-extractallholesandbordersc): to extract the lines of the free contours and the holes in a mesh
- [External Contour](/v1/docs/cyclone-3dr-externalcontourc): to compute the external contour of a mesh seen from a specific direction

Several other tools are available in the software to extract and manage polylines. They are situated in the menu Extract:

- [Intersection](/v1/docs/cyclone-3dr-intersectionc): to compute various intersections, between polylines, meshes and geometric shapes
- [Projection](/v1/docs/cyclone-3dr-projectionc): to compute various projections, such as a point or a polyline on a plane or on a mesh