For details about [Print Method] to [Reverse Black/White] properties, please see the following.
34.6.2 Printer Settings Guide
Paper Size
Select the print paper size: [A3], [A4], [B5], [B5] or [Letter]
Margin
Specify the top, bottom, left, and right margins from 3 to 20mm.
Printer Head Print Direction
Select from [Bidirectional] or [Unidirectional] With unidirectional printing, since the printer head is moving right to left without printing, the printing speed is slower but the quality is higher than bidirectional. With bidirectional printing, the printer head prints in both directions so the printing speed is faster.