Use “Generate one package for all SKU” to create one package for all SKU available by default in “Items”.
Note that this will replace any packages already created in “Shipment”.
Click the “Delivery draft actions” button and select “Generate one package for all SKU”.

A pop-up window will appear where “BX – Box” is selected by default.

Click to “Choose package type” if in need of create another package type than a box.

Click “OK”.

One package with all SKU will be created according to the selected package type.

“Items” will be empty.
