> For the complete documentation index, see [llms.txt](https://help.holixa.com/t4r/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.holixa.com/t4r/features/list-of-mep-features/pipe-duct-symbols.md).

# Pipe / Duct Symbols

**Icon:** <picture><source srcset="/files/ZZ5rGAabvonZr1TPkPF8" media="(prefers-color-scheme: dark)"><img src="/files/fEucDyHVmiBSwqUdISjT" alt="" data-size="line"></picture>

**Location:** ribbon Holixa T4R MEP, panel Description

**Packages:** Holixa T4R Silver

### Overview

The function Duct symbols adds annotation symbols on ducts and pipes.&#x20;

In the dialogue, you can specify the system, symbol, offset and diameter.

<figure><img src="/files/2pXNLFY3JAWuT5UTOZDF" alt=""><figcaption></figcaption></figure>