For those who do not know:
 amigaguide.library is Commodore's great hypertext system that can
 easily be used to view documentations or to implement online-help into
 own applications.
 It needs Kickstart 1.3 or better.
 You can get it from Fish Disk 920 or from Aminet as text/hyper/aguide34.lha

amigaguide.library V34+ can show AmigaGuide documents and ASCII documents.
V39+ that comes with OS3.0+, can show all kinds of files that are supported
by your datatypes including AmigaGuide and ASCII texts.
So, with OS3.0+, you can enter the name of a picture in ZShell just like
a command to view it.