The Print Label activity in the NPI Process Definition window includes a Label Printing Mode selection to allow you to set up to print labels automatically whenever a barcode is started.
In NPI, open a process definition and add a Print Label activity to the desired step in the process.
Double-click the Print Label activity, then select the Activity Details tab.
Use the Select Label template drop-down to select a label template for this activity.
Select Automatically print when barcode started from the Label Printing Mode drop-down.
Now each time a barcode is started, a label will print automatically.