# Connecting Flow Blocks to Other Flows

- Updated on May 5, 2026
- Published on Sep 16, 2024
- 8 minute(s) read

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 v39, 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 ( **Flows** \> **Top-level Flows**). You can view all of your flows on the All Flows page ( **Flows** \> **All Flows**).

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 top-level flow you want to unlink a flow in.
2. Click **Edit Flows**. If the flow you want to unlink is linked to a subflow, click **View** for that subflow on the canvas. You may need to complete this step multiple times to find the parent flow of the flow you want to unlink.
3. In Flow Studio, click on the block linked to the subflow you want to remove, and click on it to reveal its settings.
4. In the **Notification Flow** drop-down list, select **None**.
5. Click **Save**.