Page Up/Page Down appear to do nothing for me in Preview Mode.
Steps to recreate:
[LIST=1]
[*]Press 'x'; observe 'PREVIEW MODE' text appears in bottom-left Screen Panel
[*]Press PgUp/PgDn
[/LIST]
The help text immediately below "PREVIEW MODE" says that PgUp/PgDn "Scroll through the hotkey list"
What else do I need to do to bring up the hotkey list?