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

# Edit Part of a Message

> Change a single part of a message and leave the rest untouched.

The **Edit Part of a Message** block lives in the **Messages** palette category. Change a single part of a message and leave the rest untouched.

## What it does

Surgical edits: change one embed field, content line, or timestamp without resending the full message.

## Configuration

Open the block in the builder sidebar to configure these fields.

### `message_id`

**Type:** `block-reference`. Required.

Target message from a prior Send a Message block or a snowflake variable.

### `target_part`

**Type:** `string`. Required.

Which piece to change (content, embed title, footer, image URL, etc.).

### `mode`

**Type:** `string`.

Set a new value or clear the part entirely. Accepted values: `set`, `clear`.

### `new_value`

**Type:** `string`.

Replacement text, URL, hex color, or ISO timestamp.

## Tips

* Use this for counters and status lines instead of editing the entire message payload.

## See also

* [Messages](/builder/action-blocks/messages) — Browse all blocks in the Messages category.