Debugging in IP BW 7.0

Hello Planning experts

I am wondering if it is possible to debugg as following:

- Planning modeler: What has to be done, once executing a function in the planning modeller in order to start the debugging mode ?

- Bex-Workbook: What has to be done, once executing a planning function in the Bex-Workbook in order to start the debugging mode ?

Thanks and welcome every answer, which helps me to know this debugging feature possibilities in IP BW 7.0

Christian