"To customize columns in a Related List:

1. Log in to Zoho CRM with Administrator privileges.
   
2. Click Setup > Tab Settings > Related List Columns.
   
3. In the Related List Columns page, select the module from the Modules List.
   
4. Select the fields from the Available Columns that you want to be displayed in the Related List.
   
5. Click (arrow icon) to move the selected fields to the Selected Columns list.
   
6. Click Save."