# Connecting Flow Blocks to Other Flows

- Published on Oct 10, 2024

While there are many ways to customize individual flows, you may also want to configure custom behavior outside of a flow for submissions processed through certain blocks. For example, you may need to send submissions' state-change information to your downstream systems mid-flow. With the **Notification Flow** field in Submission Initialization and Manual Supervision Blocks’ settings, you can link Notification flows to specific blocks in your Document Processing flow.

## Top-level flows

When you link one flow to another flow’s block, you create a _flow group_. A flow group consists of all flows that are linked together to automate a single set of tasks.

In v38, the Document Processing flow included with the application is a top-level flow. Your top-level flows appear as cards on the Top-level Flows page. To view a list of all dependent subflows included in a top-level flow, click on the top-level flow’s **Open →** link.

## Linking a notification flow to another flow

### Document Processing flows from v38

To link a notification flow to the top-level flow:
1. Go to the Top-level Flows page, find the Document Processing flow you want to link a Notification flow to, and click its **Open →** link.
2. Click the Start Document Processing Subflow Block.
3. In the **Settings Type** drop-down list the right-hand sidebar, click on the name of the setting type that matches the block that you want to link a notification flow to.
   - Click **Submission Bootstrap** to see settings for the Submission Initialization Block.
   - Click **Classification** to see settings for the Manual Classification Block.
   - Click **Identification** to see settings for the Manual Identification Block.
   - Click **Transcription** to see settings for the Manual Transcription Block.
   - Click **Flexible Extraction** to see settings for the Flexible Extraction Block.
4. In the **Notification Flow** drop-down list for the block (e.g., **Submission Initialization Notification Flow**), select the notification flow that you want to link to (e.g., **Submission State Notifications V38**).
5. Click **Save**.

### Document Processing flows from v37 and earlier

To unlink a flow from a Document Processing flow or from a copy of one:
1. Go to the Top-level Flows page, and click on the **Open →** link for the flow group you want to unlink a flow in.
2. Click the Start Document Processing Subflow Block.
3. In the **Settings Type** drop-down list the right-hand sidebar, click on the name of the setting type that matches the block that’s linked to the subflow you want to remove.
   - Click **Submission Bootstrap** to see settings for the Submission Initialization Block.
   - Click **Classification** to see settings for the Manual Classification Block.
   - Click **Identification** to see settings for the Manual Identification Block.
   - Click **Transcription** to see settings for the Manual Transcription Block.
   - Click **Flexible Extraction** to see settings for the Flexible Extraction Block.
4. In the **Notification Flow** drop-down list for the block (e.g., **Submission Initialization Notification Flow**), select **None**.
5. Click **Save**.