Although you can open a version 6.0.X System file under System 7 to get a
list of fonts, DAs, or sounds installed, don't choose Print Window or Page
Setup for that window. When you open the System file on the version 6.0.X
disk, System 7 tries to use the System resources from the version 6.0.X
file -- the most recently opened resource file -- which causes
unpredictable results, including displaying garbage in the menu bar.