# Sending elastic channel messages in Amazon Chime SDK meetings
<a name="send-messages-elastic"></a>

The [https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_messaging-chime_SendChannelMessage.html](https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_messaging-chime_SendChannelMessage.html) API creates messages at the sub-channel level. To send messages, you must have a `subChannelId`. You can also use the [https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_messaging-chime_UpdateChannelMessage.html](https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_messaging-chime_UpdateChannelMessage.html), and [https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_messaging-chime_RedactChannelMessage.html](https://docs.aws.amazon.com/chime-sdk/latest/APIReference/API_messaging-chime_RedactChannelMessage.html) APIs to edit and delete messages, but in all cases, you must have a `subChannelId`.

**Note**  
Message senders can only edit or redact messages if they belong the sub-channel that they send messages to. If membership balancing transfers a member to another sub-channel, that member can only edit or redact the messages that they send in that new sub-channel.