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

# Locking threads

> Permanently close a thread so nobody can reply to it.

Locking a thread permanently closes it. Once locked, no one on your team can reply to it.

If a customer replies to a locked thread, Plain automatically creates a new thread so the conversation can continue.

## Lock a thread

There are three ways to lock a thread:

* Open the thread, click the overflow menu in the thread header, and select **Lock thread**.

* Right-click the thread in the thread list and select **Lock thread**.

* Open the command palette with <kbd>⌘</kbd> + <kbd>K</kbd>, search for **Lock thread**, and select it.

## What happens when you lock a thread

* The thread status changes to **Done**.

* Replies are disabled for your team.

* The lock is permanent. Threads cannot be unlocked.

## Automate thread locking with workflows

You can lock threads automatically using workflows. Two options are available:

* **Condition:** Thread is locked

* **Action:** Lock thread