# Modify static overlay on a running event
<a name="modify-static-overlay-on-a-running-event"></a>

In a running event, you can use the REST API to add more static overlays, modify the behavior of an existing static overlay, or delete an existing static overlay.

**Note**  
Commands sent during an event change the event XML. Therefore, if you export the XML and create a new event with it, the new event will have any overlays set up as they were set during the course of the event, not as they were when the event was created. 

## HTTP request and response
<a name="http-request-and-response-running"></a>

**HTTP URL - one input** 

To add, modify, or delete the static overlay in one input element.

```
POST http://<Live IP Address>/live_events/<id>/image_inserter/input/<input id> 
```

Where `<input id>` is the unique ID automatically assigned to this input when the event is created or when the input is added to the event. 

or: 

```
POST http://<Live IP Address>/live_events/<id>/image_inserter/input/by_label/<input label> 
```

Where `<input label>` is the input label you assigned when you created this event or created this input. Input labels are always optional.

**HTTP URL - all outputs** 

To add, modify, or delete the static overlay in all outputs.

```
POST http://<Live IP Address>/live_events/<id>/image_inserter 
```

**HTTP URL - one output** 

To add, modify, or delete the static overlay in one output.

```
POST http://<Live IP Address>/live_events/<id>/image_inserter/output/<output id>
```

Where `<output id>` is the unique ID automatically assigned to this output when the event is created.

**HTTP URL - outputs for one stream assembly** 

To add, modify, or delete the static overlay in the outputs associated with a given stream.

```
POST http://<Live IP Address>/live_events/<id>/image_inserter/output/by_stream/<stream id>
```

Where `<stream id>` is the `<ID>` automatically assigned to this stream when the event is created. The ID can change while the event is running (for example, if another stream is deleted), so you may need to obtain the current ID before sending this command.

**Body of request ** 

XML content consisting of: 
+ One or more image\$1inserter elements that each contains:
  + 1 to 8 <image> elements that each contains the tags in the table in the section [Create or modify a non-running event with static graphic overlay](create-or-modify-a-non-running-event-with-static-graphic-overlay.md).

For information about the tags to include for different actions, see [Types of changes](step-c-manage-overlays-on-a-running-event.md#static-overlay-types-of-changes).

**Response** 

The response repeats back the data that you posted with `<ID>` tags for `image_inserter` and each overlay. If the event is not running, the message “Event <ID> is not running” is returned.

## Example
<a name="example-running-event"></a>

The following request modifies the overlays in the event with the ID 16. It modifies the start time on the existing overlay in layer 3.

It also adds one overlay (in layer 4); if an overlay already exists in layer 4, that overlay is replaced with the new overlay (even if that overlay is currently running). If an overlay does not exist in layer 4, the overlay is added.

```
POST http://198.51.100.22/live_events/16/image_inserter
```

```
<?xml version="1.0" encoding="UTF-8"?>
  <image_inserter>
    <image>
      <activate>true</activate>
      <layer>3</layer>
      <start_time>17:09:09:10</start_time>
    </image>
    <image>
      <activate>true</activate>
      <duration>30000</duration>
      <fade_in>10</fade_in>
      <fade_out>10</fade_out>
      <height>900</height>
      <left>300</left>
      <top>400</top>
      <layer>4</layer>
      <start_time>16:09:09:10</start_time>
      <width>800</width>
      <image_inserter_input>
        <uri>mnt/storage/logo.bmp</uri>
      </image_inserter_input>
    </image>
  </image_inserter>
```