# Create Workspace for Extension
Before building a Custom Extension, users must first create an **Extension Workspace**.\
The workspace serves as a **development scaffold** that contains configuration, UI metadata, and resources required to build the Extension as a reusable activity node.
ONEWEB Process Designer provides a dedicated interface to generate this workspace automatically.
***
### Accessing the Build Workspace Menu
In **Process Designer**, a new menu is available to manage extensions.
1. Click the **Extensions** icon 
2. Select **Build Workspace**
This opens the **Build Workspace** screen.
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### Enter Extension Workspace Details
On the Build Workspace screen, enter the required details for your extension, such as:
* Extension name
* Description
* Package or identifier information
These details define the **identity and metadata** of the custom activity node.
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### Designing the Extension Look & Feel
While creating the workspace, users can also define the **visual appearance** of the custom node.
#### Custom Node Icon
* Drag and drop a custom image into the **Browse File** panel
* This image will be used as the **node icon** in Process Designer
#### Node Background Color
* Change the background color by clicking the **Node Color** field
#### Preview
* The **Node Extension** preview section displays the final appearance of the node
* Users can visually verify the icon and color before proceeding
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### Defining Extension Data (JSON Configuration)
Users can define the data structure displayed on the **Extension tab** using a JSON configuration.
* Click the **SET** button in the **Json Generate Form** field
* Define the required input and output structure as JSON
This configuration controls how data is presented and configured when the extension is used in a workflow.
***
### Using Sample Configurations
The **Example** tab provides predefined sample configurations that users can:
* Review for reference
* Use as a starting point for their own extension design
This helps reduce setup effort and ensures correct configuration patterns.
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### Building the Workspace
Once all configuration details are completed:
1. Review the extension details in the **Node Extension** preview section
2. Confirm the icon, color, and configuration
3. Click **Build Workspace**
#### Result
* The system generates the extension workspace
* The workspace is downloaded to the user’s machine as a **ZIP file**
* This ZIP file serves as the base for extension development
***
### Summary
Creating an Extension Workspace is the first and essential step in building Custom Extensions.
Key points:
* Workspace is created via **Extensions → Build Workspace**
* Defines extension metadata and UI appearance
* Supports custom icons and node styling
* Allows JSON‑based configuration definition
* Workspace is downloaded as a ZIP file for development
This workspace provides the foundation for building, packaging, and installing reusable **Custom Activity Nodes** in ONEWEB Process Designer.
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