Help: Please see FileAttachment for more information about attaching files.
Bug: Internet Explorer 4.0 or earlier: If you get an "Internal Server Error" message when you upload a file, you need to try again. It should work the second time.
Properties: The comment and visibility (i.e. is attachment hidden) can be changed without uploading a file by pressing "Change Properties only"; see HiddenAttachment.
Change comment: If you use Change Properties to change a comment, the comment shown in the topic will change, but the comment shown against the attachment history will be the comment when the file was uploaded.
Local file: If you select a different file in Local file:, it is this that will be updated or added.