When sending a scan file by e-mail, you can enter a subject line for the e-mail.
Press [Subject].
Enter the subject.
Press [OK].
If you do not specify the e-mail subject, the settings specified in [Default E-mail Subject] on the [Send Settings] tab under [Scanner Features] will be applied. For details, see "Send Settings".
For details about entering the text, see "Entering Text", About This Machine.