Initializing the delta in BI 7.0

Hello,

I am new to BI 7.0.

I want to know that if we are doing delta upload then how do we initialize delta in bi 7.0?

As the data is transfered to psa first through infopackage.But is option is comming for delta upload in the infopackage.

Also in the DTP there is no option for initializind delta.