# RCS channel properties

There are RCS channel-specific properties that can be used when making calls to the Conversation API. These properties can be listed under `channel_properties` in the message request.

For example, below is the code for adding the channel specific property `RCS_WEBVIEW_MODE` on the RCS channel:


```json
{
  "app_id": "{{APP_ID}}",
  "recipient": {
    "identified_by": {
      "channel_identities": [
        {
          "channel": "RCS",
          "identity": "{{RCS_IDENTITY}}"
        }
      ]
    }
  },
  "message": {
    "choice_message": {
      "text_message": {
        "text": "What do you want to do?"
      },
      "choices": [
        {
          "url_message": {
            "title": "Open sinch.com",
            "url": "https://www.sinch.com"
          }
        }
      ]
    }
  },
  "channel_properties": {
    "RCS_WEBVIEW_MODE": "TALL",
    "RCS_CARD_ORIENTATION": "HORIZONTAL",
    "RCS_CARD_THUMBNAIL_IMAGE_ALIGNMENT": "LEFT"
  }
}
```

The relevant RCS channel properties are detailed in the table below:

| Property name | Property value |
|  --- | --- |
| `RCS_WEBVIEW_MODE` | The size of a webview to open when sending an OpenUrl action. Setting this option indicates that a webview should be used. When this property is not provided, the link will be opened in the user's default browser. Possible options are `FULL`, `HALF`, and `TALL`. |
| `RCS_CARD_ORIENTATION` | Defines the orientation of a [standalone rich card](https://developers.google.com/business-communications/rcs-business-messaging/reference/rest/v1/phones.agentMessages#standalonecard.cardorientation) for RCS messages. Possible values are `HORIZONTAL` and `VERTICAL`. Default: `VERTICAL`. |
| `RCS_CARD_THUMBNAIL_IMAGE_ALIGNMENT` | Defines the image preview alignment in a [standalone rich card](https://developers.google.com/business-communications/rcs-business-messaging/reference/rest/v1/phones.agentMessages#standalonecard.thumbnailimagealignment) for RCS messages. This property is only relevant when using horizontal rich cards (when `RCS_CARD_ORIENTATION` is set to `HORIZONTAL`). Possible values are `LEFT` and `RIGHT`. Default: `LEFT`. |