Label Printing -Design

Hi All

Could you please let me know ,how to design and how WMS will work for the following.

1: We want to print "Shipping Contents" Label at the time Pick drop

so we i identified the business flow and label type & label format

So configure the system

1: business flow  label type and format , and respective fields

While performing the PICK DROP, how system will identify the data elements( suppose to print)

and if need to add any custom fields to this hipping Contents" Label  what kind of changes need made and how WMS module will work

Thanks

Ram