This option is suitable for files that are not plain text. These can include word processed documents or pictures.
This screen looks like:-
If you decide that you do not wish to attach any file, select the Back to Compose Screen button to return to the Compose screen you came from.
To attach a file to your message type the name of the file in the File box or use the Browse... button to select one. Once you have chosen the file, selecting the Attach file button will return you to the Attach file screen. The name of the document, and its size and type will be listed.
For example:-
MIME Attachments
1. Randomfile.pdf (15152 bytes) of type application/pdf Detach
Attach file:
This gives you the opportunity to cancel the attachment (by using the Detach link by the file name) or to add further attachments.
Once you have finished selecting attachments you need to select the Back to Compose Screen button to return to the main Compose screen. You will not see the file name there but the Attachments button will change to show the number of files that will be sent as attachments to your message for example:-
You can then continue to edit the message.