If you set functions that are not supported by the device you are using in the [Print Settings] screen of this app, the settings will not be applied.

[Job] – [Store]
For devices that do not support user inbox storing, normal printing is executed.
[Output Size]
If you specify a paper size that is not supported by the device, the print job is printed on another paper size or a paper confirmation message is displayed on the control panel of the device.
[Color] – [Color]
For devices that do not support color printing, the settings are not applied and the print job is printed in black and white.
[2-sided] – [ON]
For devices that do not support 2-sided printing, the settings are not applied and the print data is printed on one side of the paper.
[Staple] – [ON]
For devices that do not support stapling, the settings are not applied and the print data is printed without being stapled.