# Setting up the event to pass through custom data
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After you have enabled SMPTE 2038, you can identify the custom data to extract, and then set up to include that data in your SMPTE 2110 outputs.

**Note**  
The information in this section assumes that you are familiar with the general steps for creating an event.

**To pass through custom data**

1. Decide which custom data you want to pass through to the SMPTE 2110 outputs. Make a note of the DID/SDID values.

1. On the Elemental Live web interface, display the details for the event that you want to set up.

1. In the **Input** section of the web interface, find the input that contains the SMPTE 2038. Find the **Add Custom DID/SDID Pair** button below the **Prefer SMPTE 2038** field. The button appears only if you selected the **Prefer** field.

1. Click the button and enter the appropriate values in the DID and SDID fields that appear. Repeat to add more pairs.

1. In the web interface, find the SMPTE 2110 output where you want to pass through the custom data. Find the ancillary output for that output. If you are not sure how to set up an ancillary output for SMPTE 2110, see [Step 3: Create SMPTE 2110 output group](config-output-2110.md).

1. In the **Ancillary Data Settings** section, select **SMPTE 2038**.

   Elemental Live will extract each custom data pair that you identified in the input, convert it to a SMPTE 291 packet, and include it in the ancillary data stream of the SMPTE 2110 output.