---
title: "Edit river section roughness"
slug: "how-to-globally-edit-roughness-of-river-section-nodes"
description: "Learn how to globally edit roughness of river section nodes on Flood Modeller. "
tags: ["1D river modelling", "river section", "bridge"]
updated: 2022-08-04T05:50:39Z
published: 2022-08-04T05:50:39Z
canonical: "help.floodmodeller.com/how-to-globally-edit-roughness-of-river-section-nodes"
stale: true
---

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

# Edit river section roughness

Note that to edit the roughness of **River Section** nodes (or any other node) within a river network, you must first have the river network [Loaded](/v1/docs/how-to-load-a-network) and active.

Note: this guide refers to the **River Section** node in particular, however a checkbox enables the same method to apply to **Bridge** nodes.

The **Toolbox** provides multiple options for globally editing parameters. This is accessed via the fourth tab of the right-hand panel group. Click **Global Edit** and then **1D River Networks** to access the **Roughness** editor tool.

![EditingToolsimagesglobaledit.PNG](https://cdn.document360.io/5074bc26-a9ef-4bf4-b1de-a5c6ce628aca/Images/Documentation/EditingToolsimagesglobaledit.PNG)

Double-click to open the tool in a new pop-up window.

Select modifications to apply to the active river network. Note that checkboxes are provided to apply the modifications only where the current roughness value is equal to a specified value (e.g. 0), and to apply the modifications only to selected nodes. Un-check the box(es) provided to apply the specified modifications to all relevant nodes in the network.

![EditingToolsimagesglobaledit2.PNG](https://cdn.document360.io/5074bc26-a9ef-4bf4-b1de-a5c6ce628aca/Images/Documentation/EditingToolsimagesglobaledit2.PNG)

Click OK to apply the modifications. Don't forget to save your network!