Aggregation in MIRO

Hi

What are the options in SAP to create own defined layouts for MIRO with aggregation on columns that are not a part of the default aggregation layouts provided by SAP?

My "simple" requirement is to have an aggregation on the column Condition Type (DRSEG-KSCHL) under "Planned Delivery Cost" in MIRO.

Example:

A PO is created with 10 lines - each line have a purchase price and two delivery cost conditions - freight and customs.

Now in MIRO I would like to be able to go to planned delivery cost and choose a layout that aggregates the 10 lines into two lines - one line for each delivery cost condition.

Is this possible?

I do not understand fully the OLMRLIST transaction so I appreciate any input

Thanks

Thorben Hald