# How to Add Column Mapping
The application allows users to map columns manually.
* Navigate to **Advanced Tools > Lineage Maintenance** and select the Object type, Connector Name, Schema, and Table.
* It displays the list of source and destination lineage objects.
* Users can click the **edit** icon in the "**Columns**" field.
* A new window appears, where users can add new rows based on the requirement.
* Users can select the Source Column Name and Target Column Name from the dropdown list and specify comments as needed.
* Users can map columns using the “**Map column via AI**” option. This automatically fills in the suggested source and target columns, which users can adjust or delete as required.
