> For the complete documentation index, see [llms.txt](https://docs.justransform.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.justransform.com/development/mapper-and-map-chains/map-chains/running-a-map-chain.md).
# Running a Map Chain
To run a Map Chain within Justransform, click "**Open**" within the Map Chain Module and select the saved Map Chain from the Resources folders.
1. Click the **Run** icon which will display the following popup.
### Input Section
The Input Section allows you to provide the input data for the Map Chain or click **Select Test Source** to open the Resources dialogue to insert a preset input data configuration.
### Process Breakdown
The left side process breakdown shows each map chain link which helps you navigate through JTMap and JTScript code. Once selecting a map chain link, the right hand side panel has 4 sections:
1. **JTMap / JTScript Code :** Displays the code generated using JTMap / JTScript
2. **Test Input Data :** Displays the test input data either selected by the user or provided as an output by the previous JTMap/JTScript.
3. **Output :** The output generate by the code using the test input data.
4. **Debug :** If user has any debug comments, those will be displayed here.
### Results
The left side Results panel displays the final output of the Map Chain.
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