Scrolling Within a Message
==========================
When Rmail displays a message that does not fit on the screen, you
must scroll through it to read the rest. You could do this with `C-v',
`M-v' and `M-<', but in Rmail scrolling is so frequent that it deserves
to be easier to type.
`<SPC>'
Scroll forward (`scroll-up').
`<DEL>'
Scroll backward (`scroll-down').
`.'
Scroll to start of message (`rmail-beginning-of-message').
Since the most common thing to do while reading a message is to
scroll through it by screenfuls, Rmail makes <SPC> and <DEL> synonyms of
`C-v' (`scroll-up') and `M-v' (`scroll-down')
The command `.' (`rmail-beginning-of-message') scrolls back to the
beginning of the selected message. This is not quite the same as `M-<':
for one thing, it does not set the mark; for another, it resets the
buffer boundaries to the current message if you have changed them.