Adding and using keyboard shortcuts in the Print dialog box

Generally I have found that added keyboard shortcuts for the drop-down menu in the Print dialog (such as in this hint) only work only for the items above the dividing line. As Apple notes, "you can create keyboard shortcuts only for existing menu commands." And all the commands below the dividing line are transient menu items, as they are there only because they are in the PDF Services folder, in the Library folder of the user or the system. If you take them out of there, they will disappear from the Print dialog drop-down. Hence it seems that they are not considered available for keyboard access by the system.

Except there is one way that I have just now discovered to get this to work.

You can use the Tab key to cycle through to the drop-down menu. Now you can use the down arrow to open the menu. At this point, you can use your shortcuts for items below the line. Two things to note when usin...