---
title: "Creating Master Type"
slug: "creating-master-type"
updated: 2025-01-02T09:54:30Z
published: 2025-01-02T09:54:30Z
canonical: "help.symphonysummitai.com/creating-master-type"
---

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

# System Defined Master Types

System Defined Master Types are noneditable and predefined by developers. In System Defined Master Types, name of the Master Type cannot be changed. To understand **System** **Defined** **Master** **Types**, let us create a **Master** **Type** by performing the following steps:

1. Navigate to **Platform** **Studio** > **Platform Masters** > select **Common** **Master**.

2. Click the **Master** **Type** drop down.

On selecting a System defined Master Type, the **Add** **Master** **Value** button will only appear if selected **System** **Defined** master type is editable (i.e., a master type that will allow App Designer to add new value).

![](https://cdn.document360.io/62351b42-cfbd-43ad-8ce1-82b8f455337f/Images/Documentation/1%20GIF.gif?sv=2026-02-06&spr=https&st=2026-10-31T14%3A45%3A41Z&se=2026-10-31T15%3A45%3A41Z&sr=c&sp=r&sig=%2BSMtZgiajKcJQC4xF5kcHa7MrbZfXW6krGXlvfzNRjY%3D)

Figure: Master Type selection screen Master Types are grouped under **System** **Defined** and **User** **Defined** master Types.

Let's explore the following use-case.

| **Use Case****User Persona: Administrator** | **Solution** |
| --- | --- |
| Sam, an Administrator wants to select a System Defined Master Type named Information Master. | In this case, the Add Master Value button will only appear if selected System Defined master type is editable (i.e., a master type that will allow Application Designer to add new value). On selecting an un-editable (i.e., a master type that will not allow App Designer to add new value) system defined master type, Add Master Value button will not appear. |

### Difference between System Defined and User Defined Master Types

Here are the key differences between System Defined Master Type and User Defined Master Type.

| **System Defined Master Type** | **User Defined Master Type** |
| --- | --- |
| 1. System Defined Master Types are predefined by developers. | 1. User Defined Master Types are created by the user. |
| 2. System Defined Master Types are not editable. | 2. User Defined Master Types are editable/configurable. |
| 3. In System Defined Master Types, name of the Master Type cannot be changed. | 3. In User Defined Master Types, the name of the Master Type can be changed. |