Use
Sub-operations represent an additional level of detail for an operation and are situated hierarchically below an operation. You can create different types of sub-operation for one operation. For example, you can create externally processed sub-operations for internally processed sub-operations and vice versa.
Procedure

You have just entered operation 0030.
In the next operation line you will see the number 0040.
5. To create more sub-operations for the same or another operation, repeat step 4 as often as required.
6. To insert a sub-operation in a list of existing operations, position your cursor on the operation line following the operation for which you want to create a sub-operation.

If you want to create a sub-operation for operation 0030, position your cursor on the operation 0040.
Then use the menu bar sequence Edit
The system enters an appropriate line where you can enter data. Enter the required data as described in the previous steps:
8. If you assign a sub-operation to the wrong operation, you can easily change it by overwriting the operation number with the number of the operation to which the sub-operation should be assigned, and choosing Continue.
9. The following options are available to you once you have created all the necessary sub-operations.
For more information on the data you can enter for sub-operations, see