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Go to top navigation bar Apps > Manage your apps.
You should see the Tissue Configuration on the left panel under APPS.
Click on the Tissue Configuration, and you should be on the configuration page
Fields in a data source
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On the configuration page, click on Add at the top right hand corner.
Enter the details and click on Add.
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Editing data source
Click on the edit icon under Actions column.
Edit the details and click on Update.
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Deleting data source
Click on the delete icon under Actions column.