MB5B has default selection parameters filled

Hi All,

i see that in MB5B transaction, the selection parameters (check boxes) are automatically filled as soon as the transaction is called. I see that therer is no by default = 'X' for these check boxes. would like to understand from where are these check boxes getting filled from.

I have made a Z copy of MB5B transaction and this automatic selection of checkboxes is creating problem for selection in my Z report. Please Suggest how do i avoid this.

Regards,

Lavanya