Opportunities - Accounts

To setup custom fields:

Select Configuration → Custom Configuration

Select “Add Custom Fields” tab.
Select the “Role Type” from the dropdown.

Enter “Custom Field Name” field
Select “Custom Group”, “Custom Field Type”, “Control Type” and “Field Type” from its corresponding dropdown.
Select “Add” .

Once added the custom field, it will be displayed in Custom Field list.

To view the custom field added, goto View page of the corresponding role type.