macOS Monterey 12.4 has a bug in the new user-interface layout for defining a custom paper size. The left and bottom margin values appear to be switched. The value entered for one field applies to the margin with the opposite label. The workaround for now is to swap the two values, entering the bottom margin value in the left field and vice-versa. This bug appears to affect all printing applications (including Qimage One) which use the built-in macOS user-interface to access the driver.