Below are guideline(s) for setting printer letter half :

Do those steps at both Main printer and Client printer (if your computer printer is shared from other computer)

Step 1 : Go to Window>>Control Panel>>Devices and Printers

              Click Print Server Properties and Create New Form “LetterHalf”

Step 2 : Right Click in Printer and Choose Printer Properties

Step 3 : Click Device Setting and choose LetterHalf