The Letter Attachment document type is preconfigured with a list of supported file types. You can edit this list as needed. For example, you can add video or PowerPoint (PPT) formats to the list.
To edit the list of file types.
- Go to Documents > Admin > Document Types.
- Select Letter Attachments in the list.
- Click the File Type selector below the list and select the file types that you want to add or click the X to remove a file type from the list.
- Click Save.