---
title: "Click Holes and Borders"
slug: "cyclone-3dr-clickholesandbordersc"
updated: 2026-09-07T11:51:19Z
published: 2026-09-07T11:51:19Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-clickholesandbordersc"
---

> ## 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.

# Click Holes and Borders

![CmdClickHolesAndBorders.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/CmdClickHolesAndBorders.svg)

This command extracts polylines on the holes and the free borders.

> [!TIP]
> ### Requirements
> 
> No selection is required to launch the command.

1. All the holes/borders of the visible meshes are detected and displayed with green dash lines.
2. Click on the dash lines to define which holes/borders you want to extract as polylines.

> [!NOTE]
> **Spheres drilled with a small hole or spherical skullcaps are strictly identical from the topological point of view**
> 
> ### Technical information
> 
> In the software, concepts of “holes” and “free border or external border” are identical. Imagine for example a hollow sphere in which you pierced a small hole on the surface. The edge of this element is a circle that you call “hole”. Imagine now that the dimension of this hole increases until reaching the complete diameter of the sphere! This element that is always a circle is now called “external border”. This concept of “hole” or “external border” is, thus, only a question of vocabulary, but from a strict mathematical point of view it is the same thing.
> 
> ![image-20250506-064457.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/image-20250506-064457-2.png)