Step 1:
Go to Lists > Relationships > Customers. This will pull up the Customer list page.
Step 2:
If Inline Editing preference is not enabled, click Edit beside the Show Inactive
Once enabled, a green checkmark will appear as shown below. You will also notice a New column that will show up at the utmost left side.
Step 3:
To delete, hold the CTRL key and select the lines you want to include. You can do this when you see the Pencil icon next to the name of the column.
Step 4:
Hover over the New field and select Delete Record
