Viewing attachments
Use the menu commands in
View ‣ Attachments
to select how you would like attached files to be displayed.
When viewing attachments as tags, an attached file will appear as a metallic rounded rectangle. File attachments that can be previewed, like images, will have a triangle on their left side when you mouse over them. Click this triangle to show or hide the preview. On the right side of the attachment tag will be an arrow that you can click to open the file in the appropriate application.
When viewing attachments inline, previewable files like images and movies will be displayed right alongside your text. Other types of files will appear as blue-underlined links and the mouse cursor will turn into a pointing hand when you mouse over them. Click the link to open the file.