Finally, there are some Misc (miscellaneous) actions:
[U]pdate email & database executes the shell-command in the variable
mu4e-get-mail-command, and afterwards updates the mu
database; see Indexing your messages and Getting mail for
details.
[R]eset query-results baseline this reset the current ’baseline’
for query and updates the screen; see Bookmarks and Maildirs.
toggle [m]ail sending mode (direct) toggles between sending
mail directly, and queuing it first (for example, when you are offline),
and [f]lush queued mail flushes any queued mail. This item is
visible only if you have actually set up mail-queuing. Queuing mail
[A]bout mu4e provides general information about the program
[H]elp shows help information for this view
[q]uit mu4e quits your mu4e-session6