
Embed attached images
!myImage.png!

different wiki pages: 
!WikiFormatting^picture.gif!
!WikiToc^toc.gif!

external link (but still internal image)
!PageTitle^file.png!
!Subpage^file.png!

image with parameters
!pagename^filename.png|width=230px,align=right!

image with percentage width, but no key
!myImage.png|thumbnail!

image with dashes
!dashed-Image.png!