---
title: "Warning on Expanding Subflow Adjusting Diagram Layout"
slug: "warning-on-expanding-subflow-adjusting-diagram-layout"
description: "This documentation article covers the new warning on Expanding Subflow Adjusting Diagram Layout."
tags: ["Building Models", "Test Modeller"]
updated: 2023-09-12T10:02:45Z
published: 2023-09-12T10:02:45Z
canonical: "knowledge.curiositysoftware.ie/warning-on-expanding-subflow-adjusting-diagram-layout"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://knowledge.curiositysoftware.ie/llms.txt
> Use this file to discover all available pages before exploring further.

# Warning on Expanding Subflow Adjusting Diagram Layout

In this documentation article, learn about the new warning pop-up when expanding Subflows which will adjust the Master Model layout.

[Embedded content](https://www.youtube.com/embed/Z87Oa1m8jcQ?&wmode=opaque&rel=0)

To see the new warning when expanding a subflow, first open a model containing **one or more subflows**, as shown in the example below:

![](https://cdn.document360.io/77f722a6-2d0a-49fa-8074-572515a6c4b8/Images/Documentation/Screenshot%202023-09-12%20110028.png)

If you click the **‘+’** icon on any of the subflows, you will receive a warning saying that **‘Expanding this subflow will reset layout of your model’:**

![](https://cdn.document360.io/77f722a6-2d0a-49fa-8074-572515a6c4b8/Images/Documentation/Screenshot%202023-09-12%20110037.png)

You now have two options from here. You can select ‘**Open Subflow**’, which will open the model in a **new tab:![](https://cdn.document360.io/77f722a6-2d0a-49fa-8074-572515a6c4b8/Images/Documentation/Screenshot%202023-09-12%20110116.png)**

The second option – If you select **‘Expand’**, this will expand the subflow as it previously was by the default functionality. This means the subflow can be viewed as part of the whole model, in the same tab:![](https://cdn.document360.io/77f722a6-2d0a-49fa-8074-572515a6c4b8/Images/Documentation/Screenshot%202023-09-12%20110103.png)

Subflows are used to quickly embed and re-use models within a master model. Subflows hide detailed or complex modelling and make the master Flow more readable. They enable scalability by building out the complexity from smaller, more step-focussed Models, rather than building giant, complex, inflexible Flows.

The Master Model is simply a model which combines Subflows into one large Model. Master Models are used to join together a range of system models, visualise them and test them as a whole.

## Related

- [Quality Modeller 101](/test-modeller-101.md)
- [Building Models in Quality Modeller](/building-models-in-test-modeller.md)
- [Quality Modeller](/get-started-with-test-modeller.md)