---
title: "Edit river bed elevation"
slug: "how-to-globally-edit-river-bed-elevation"
description: "Watch the video on how to globally edit river-bed elevation in river section nodes. "
tags: ["1D river modelling", "river section"]
updated: 2022-08-04T05:49:35Z
published: 2022-08-04T05:49:35Z
canonical: "help.floodmodeller.com/how-to-globally-edit-river-bed-elevation"
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 bed elevation

You can edit the river-bed elevation in multiple **River Section** nodes at once provided you have [defined a Left and Right special marker](/v1/docs/how-to-define-special-markers-in-a-river-section) for each of the **River Section** nodes to be adjusted. The edit can be specified to occur in between the **Left** and **Right** markers, outside of the **Left** and **Right** markers, or both.

To edit the river-bed elevation:

1. Select one or [multiple nodes](/v1/docs/how-to-select-multiple-nodes) to edit within your river network. Note that the tool will only affect **River Section** nodes with special markers defined and ignore any others.
2. In the **1D River Network** table, right-click and navigate to **Model Build** > **Adjust cross section elevations**. The editor will open in a new window.
3. Select a modification and the associated value to apply, e.g. **Multiply by Factor** with a value of 2.0 to double the current values; **Change to Set Value** with a value of 8 to adjust the current values to 8.
4. Uncheck the box titled **Where value equals**. This action will cause the field underneath to also become disabled (greyed out).
5. Select where the modification should apply. **In Bank** refers to in between the **Left** and **Right** special markers. **Out of Bank** refers to outside the special markers. The option **Both** will adjust the entire cross-section elevation, ignoring the **Left** and **Right** special markers defined. The modification will not apply in a **River Section** that does not have a **Left** and **Right** special marker defined.
6. Click **OK** to make the modification
7. A pop-up window will confirm the number of nodes edited and the total number of edits made.
8. Don’t forget to **Save** your river network after making changes.

[YouTube video player](https://www.youtube.com/embed/tAZRsrne4Og)