When you drag a file from another application, you can drop it onto either the Print Tool icon or the drop target of the Print Tool window.
To print a file by dragging and dropping:
Display the item you want to print.
A file in the File Manager window
A mail message in Mail Tool
An attachment in a Mail Tool message
To drag more than one file, click ADJUST on additional files.
Release the mouse button to drop the file.
Printing should begin.