---
updatedAt: 2026-03-30T08:46:42.000Z
agentTools:
projectIndex: https://docs.checkmarble.com/llms.txt
---
# Custom lists
Represent custom data source any field types
# Introduction
Lists serve as custom data sources necessary for creating Rule. They can be utilized in multiple contexts, and their values can be managed independently of the Scenario's lifecycle.
# Create a list
1. Go to Detection section and select the `Lists` tab
2. Click on *New list*
3. Complete the form to generate a new list :
1. **Name**: this serves as a concise label utilized to identify the list throughout the application.
2. **Description**: this provides users with a reminder of the list's purpose.
# Update a list
## Update name and description
1. Go to an existing list
2. Click on the `Edit` button to edit the name or description
## Create a list value
1. Go to the list detail
2. Click on the `+ New value` button and complete the form
## Add values from a CSV file
If you already have a list of values you would like to add to your list, you can add them by batch by uploading a CSV file:
1. Go to the list detail (screenshot above)
2. Click on the`Pick a CSV file` button and select your file, or just drag and drop your file to the area
> Your CSV file should only contain the values you want to add to the list: one column and no header.
## Delete a list value
1. Go to the list detail (screenshot above)
2. Search for the value using the input
3. Click on the delete button
# Delete a list
1. Go to the list detail (see capture in update section for more detail)
2. Click on the `Delete this list` red button at the bottom (see above capture)