Make sure that the list of [Scheduled jobs] is empty.
The text on the button changes from [On] to [Off].
Note that you can only switch the [Transaction printing online] function to offline when
The transaction print jobs are ready.
The printer contains no more print data.
The printer has stopped because all the jobs are ready, not because an error has occurred.
When you switch [Transaction printing online] to offline, the connection to the host is disconnected automatically.
The text on the button changes from [On] to [Off].
You can also put the printer offline via the [Transaction printing] section in the Settings Editor.