Attachment File Type lookup code is used to define the file formats allowed while attaching a file.
To define or modify an attachment file type:
In the File Type and the Description box, type the code and description of the file format.
Click Save to save the attachment file type details.
To modify an existing attachment file type, in the File Type box, type the file type. You can also click to browse for a file type.
Modify the required details and click Save to apply the modifications.