Hello Rkoreto,
To print on a custom paper size, you would need to register the custom paper size and enter the dimensions. Once registered on the printer, you can print from the computer. In the print window that appears on the computer, yu can click the drop down for the paper size selection. At the bottom of the list, you will see a size marked as custom. Once selected, it will give you the option to enter the dimensions. You can view the steps for the process from our Knowledgebase using the link HERE.
