f - filter the current search terms
o - toggle search screen order
m - compose a new message
+ r - reply to thread
s - enter search criteria
,s - alter search criteria
t - filter the current search terms with tags
c - toggle folding of citations
h - toggle folding of extra header lines
m - compose a new message
+ r - reply to the message
s - toggle folding of signatures
q - return to search display
? - reveal the message and thread IDs of what's under cursor