1. Click "Go To"

2. Click "Quotations"

3. Click "List"

4. Click "Screen Options"

5. Search for the field you want to add

6. If you cannot find a field you need click "Create a new field"

7. Choose the "type of field" you want

8. Choose a name

9. Click "Create"

10. Click outside the popup

11. You have now added columns (& a custom field)