In the right panel, click the Filestab. The Attachments attachmentsfolder is included by default.
Either use the upload button to upload a file to the tab or drag and drop the file.
Drag and drop: if you want to insert it at the top level of the Filestab drop it anywhere on the tab away from the attachmentsfolder. If you want to insert it into the attachmentsfolder, drop it on the attachmentsfolder.
Upload: If you want to upload the file at the top level of the Filestab, leave the tab as it is. If you want to upload the file into the attachmentsfolder, click the attachmentsfolder to open it. Then, click the upload button and upload the file from your file system.
Image RemovedImage Added
Tip
To work in an expanded view of the File tab, click the Full view button: