# Conceptual Product Structure

## How to Select Unchangeable Checkbox

| ### What to do:
| Select Start > Products > Configure Products. The Order mask is opened.
| Search for 123 Pen Order.
| Click the Show Order BOM button. The Order BOM Overview mask is openend.
| Select the component with an item assigned to it that becomes unchangeable.
| Click the Add/Update Position button. The Order Specific Postion mask is openend.
| To change to edit mode click .
| Select the Unchangeable checkbox.
| To save the entry click .
| If this Order BOM will be derived again, the unchangeabe position variant is included, also when the configurator does not find a position variant for this position.