Brother GTX-4 Instruction Manual page 86

(4) Make the following settings in the [Page Size] window:
 [Size]: [Custom]
 [Width]: 14.0 in. (355.6 mm)
 [Height]: 16.0 in. (406.4 mm)
 Page orientation: Portrait
<TIPS>

Set the width and height to the size of platen to be used. The above size is the standard 14X16 platen size.
For details of platen size's numeric values, refer to "5-5-1. For other applications: Selection of platen size >>P.107".
Create print data (ARX4 file)
Save the image data and print settings as a set of print data in ARX4 file format.
The following will be made available if the print data is converted into an ARX4 file:

Image data and print settings can be put together and stored.

Without connection to a PC, the printing can be performed directly from a USB flash memory unit.
<TIPS>

Image editing is unavailable for any ARX4 file. As such, save your image data for an editing purpose in advance.

For file output, there are some cases where neither file output destination nor extension cannot be specified by the [Print to file]
command. Be sure to use the printer driver "Brother GTX-4 FileOutput".

For details of directly sending data to the Printer from an application, refer to "6-6-3. Sending print data from other applications
>>P.161".
(1) In the menu bar, select [File] > [Print].
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Creating print data