# Editing multiplexes, programs, and channels
<a name="edit-multiplex-program-channel"></a>

In MediaLive, you can edit a multiplex, the programs in a multiplex, and the channels in a multiplex. There are specific rules that are based on the state (running or idle) of the item that you want to work with, as described in this section. 

## Editing a multiplex
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In MediaLive, there are very few restrictions on your ability to edit a multiplex. You can edit a multiplex when these situations apply: 
+ While the multiplex is idle or running, unless you want to change the **Maximum Video Buffer Delay** field. To change that field, the multiplex must be idle. 
+ While the channels in the multiplex programs are idle or running. 
+ While MediaLive is in the process of adding programs that you just created. 

**To edit a multiplex**

1. Open the MediaLive console at [https://console.aws.amazon.com/medialive/](https://console.aws.amazon.com/medialive/).

1. In the navigation pane, choose **Multiplexes**, and then choose the multiplex that you want to edit. 

1. On the **Details** pane, choose **Multiplex actions**, and then choose **Edit**. 

1. Make the changes that you want, and then choose **Save changes**.

## Editing a program
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In MediaLive, you can edit a program at any time, including when the multiplex if running or when the associated channel is running. 

**To edit a program**

1. Open the MediaLive console at [https://console.aws.amazon.com/medialive/](https://console.aws.amazon.com/medialive/).

1. In the navigation pane, choose **Multiplexes**, and then choose the multiplex that you want to edit. 

1. On the **Details** pane, choose the **Programs** tab. 

1. Choose **Program actions**, and then choose **Edit**. 

1. Make the changes that you want, and then choose **Save changes**. 

## Editing a channel in a program
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In MediaLive, you can edit a channel that is idle.

**To edit a channel**

1. Stop the channel. You can stop the channel in the usual way, from the **Channels** pane. Or you can stop it from the **Multiplex** page. For more information, see [Stopping a channel in a multiplex](stop-multiplex.title.md#multiplex-channel-stopping). 

1. Edit the channel. For more information, see [Editing a channel](editing-deleting-channel.md#editing-a-channel).