If the sender embedded them in the body of the message with Insert, Picture,
they will appear automatically when the message is opened. If the sender
attached them as picture files, you can view them one-by-one by clicking on
the filename - a single click will open them in Outlook's viewer, if one
exists for that type of graphic; a double-click will open it in the native
application for that graphic type (e.g. in Vista, Windows Photo Gallery for
..jpg, Office Document Imaging for .gif, Internet Explorer for .gif).