You can find most things you can do with this message in the View menu, or by using the keyboard; the default bindings are:
key description
==============================================================
n,p view the next, previous message
],[ move to the next, previous unread message
},{ move to the next, previous thread
y select the headers view (if visible)
RET scroll down
M-RET open URL at point / attachment at point
SPC scroll down, if at end, move to next message
S-SPC scroll up
searching
---------
s search
S edit last query
/ narrow the search
b search bookmark
B edit bookmark before search
c search query with completion
j jump to maildir
O change sort order
P toggle search property
M-left previous query
M-right next query
marking messages
----------------
d mark for moving to the trash folder
= mark for removing trash flag ('untrash')
DEL,D mark for complete deletion
m mark for moving to another maildir folder
r mark for refiling
+,- mark for flagging/unflagging
u unmark message at point
U unmark *all* messages
% mark based on a regular expression
T,t mark whole thread, subthread
<insert>,* mark for 'something' (decide later)
# resolve deferred 'something' marks
x execute actions for the marked messages
composition
-----------
R,W,F,C reply/reply-to-all/forward/compose
E edit (only allowed for draft messages)
actions
-------
g go to (visit) numbered URL (using `browse-url')
(or: <mouse-2> or M-RET with point on URL)
C-u g visits multiple URLs
f fetch (download )the numbered URL.
C-u f fetches multiple URLs
k save the numbered URL in the kill-ring.
C-u k saves multiple URLs
e extract (save) one or more attachments (asks for numbers)
(or: <mouse-2> or S-RET with point on attachment)
a execute some custom action on the message
A execute some custom action on the message's MIME-parts
J jump to MIME part by its number
misc
----
z, Z detach (or reattach) a message view to a headers buffer
. show the raw message view. 'q' takes you back.
C-+,C-- increase / decrease the number of headers shown
H get help
C-S-u update mail & reindex
q leave the message view
Some keybindings are available through minor modes:
For the marking commands, please refer to Marking messages.