Select [On] or [Off] for <Restrict File Format> → press [OK].
<Restrict File Format>:
[On]:
Only PDF or XPS files can be sent.
[Off]:
Files other than PDF or XPS can also be sent.
If <Restrict File Format> is set to 'On', and sending a file in a format other than PDF or XPS is registered in the Favorites Button, the file cannot be sent.