APO - Scheduling Planning board - operations detail extending with new tab

Hi,

we use APO 7.03. In the scheduling planning board, /SAPAPO/CDPS0, in the resource chart, when you double click an order / operation the pop-up window appears "Display operation detail (General Data)". In the standard this pop-up cotains three tabs: general data, product, relationships.

I am looking for a BAdi/User Exist to add a new tab in which the user could store operation/order related text.

thank you in advance!

best regards,

Pilvi