Auto print Goods Receipt Purchase Order

The help menu states that there is the possibility for a Goods Receipt PO to be automatically printed. The specific text is this

"Opens the Macro window. If in this window a Macro named "default" is stored, it is printed automatically after the goods receipt has been finished.Usually, API "B1DocumentGenerate" is used to access the table  "beas_document_header/beas_document_line".

There is no further guidance in how this should be setup or the steps involved to do so. I also have no default stored within the macro.